Perhaps you should try some spelling variations:
di truyen » co truyen
hanh dai » hanh tai, hanh dao, vanh dai
su triet » su viet, su tien, ve triet
so sach » so sanh, bo sach, co sach
cao hoi » cau hoi, co hoi, cao hoc
hieu va » lieu va, hieu qua
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
va cam » va cham, va cac, va cao
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: so sach v nang cao hoi. hieu va cam tuc va hanh dai ((su triet) or (di truyen))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach v nang cao hoi. hieu va cam tuc va hanh dai ((su triet) OR (di truyen)).
• Adding a wildcard symbol may retrieve word variants: so sach v nang cao hoi. hieu va cam tuc va hanh dai ((su triet) or (di truyen))*.