Perhaps you should try some spelling variations:
di truyen » co truyen
hanh dai » hanh tai, hanh dao, vanh dai
ve triet » va trien, su triet
co sach » bo sach, cuon sach, hoc sach
cao hoi » cau hoi, co hoi, cao hoc
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
va hanh » van hanh, va thanh, va danh
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
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: co sach v nang cao hoi. hieu ve cam tuc va hanh dai ((ve triet) or (di truyen))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach v nang cao hoi. hieu ve cam tuc va hanh dai ((ve triet) OR (di truyen)).
• Adding a wildcard symbol may retrieve word variants: co sach v nang cao hoi. hieu ve cam tuc va hanh dai ((ve triet) or (di truyen))*.