Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
dan lap » phan lap, dan luan
dan lai » dan loai, dan lat, dan li
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
ky lang » ky dang, ky tang, tay lang
cam tuc » cam xuc, cam tu, nam thuc
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((ky lang) or (ky nang)) xa hoi. hieu ve cam tuc va ((dan lai) OR (dan lap)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky lang) OR (ky nang)) xa hoi. hieu ve cam tuc va ((dan lai) OR (dan lap)) su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky lang) or (ky nang)) xa hoi. hieu ve cam tuc va ((dan lai) OR (dan lap)) su triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky lang) or (ky nang)) xa hoi. hieu ve cam tuc va ((dan lai) OR (dan lap)) su triet*.