TABLE textData (
  id           INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
  textData     TEXT NOT NULL
) COMMENT="Таблица с текстовыми данными"

TABLE slovaData (
  id           INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
  slovo        CHAR(50) NOT NULL UNIQUE 
) COMMENT="Таблица с имеющимися словами"

TABLE textSlovaRelation (
  id           INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
  textID       INT UNSIGNED NOT NULL,
  slovoID      INT UNSIGNED NOT NULL,
  FOREIGN KEY  (textID) REFERENCES textData(id) ON DELETE CASCADE ON UPDATE CASCADE,
  FOREIGN KEY  (slovoID) REFERENCES slovaData(id) ON DELETE CASCADE ON UPDATE CASCADE,
  UNIQUE KEY   rel (textID,slovoID)
) COMMENT="Таблица со списком слов имеющихся в данном тексте"

SELECT   aa.id
FROM     textData             AS aa
JOIN     textSlovaRelation    AS bb ON bb.textID=aa.id
JOIN     slovaData            AS cc ON cc.id=bb.slovoID
WHERE    cc LIKE "%браузер%"
    OR   cc LIKE "%завис%"
    OR   cc LIKE "%profe%"
GROUP BY aa.id
HAVING   COUNT(aa.id)=3 /*Кол-во слов в поисковом запросе*/

SELECT    aa.id 
FROM      textData  AS aa
WHERE     aa.textData LIKE "%браузер%"
    AND   aa.textData LIKE "%завис%"
    AND   aa.textData LIKE "%profe%"