Perhaps you should try some spelling variations:
hanh den » hanh de, nhanh dien, hanh dong
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
sang ma » tang ma, nang ma, sang tao
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
va hanh » van hanh, va thanh, va danh
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa
den su » dan su, nen su

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 y ((sang ma) or (mang may)) hoi. hieu ve cam tuc va hanh den su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((sang ma) OR (mang may)) hoi. hieu ve cam tuc va hanh den su triet.
• Adding a wildcard symbol may retrieve word variants: tu sach y ((sang ma) or (mang may)) hoi. hieu ve cam tuc va hanh den su triet*.