Perhaps you should try some spelling variations:
trinh dai » trinh tai, trinh di, trinh da
su triet » su viet, su tien, ve triet
va trinh » van trinh, va tinh, lap trinh
mai khoi » mai khoa, tai khoa, cac khoi
cua tre » cua te, cuu tre, cua triet
cam luc » cam xuc, cau luc
tu sach » thu sach, su sach, te sach
sach ly » sach y, sach lo, sach ty
lai hoi » dai hoi, lai hoa, lai roi
ly nang » ky nang, ly hang, ly vang
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
luc va » duc va, tuc va, loc va

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 ly nang ((lai hoi) or (mai khoi)). hieu ve cam luc va trinh dai ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly nang ((lai hoi) OR (mai khoi)). hieu ve cam luc va trinh dai ((cua tre) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach ly nang ((lai hoi) or (mai khoi)). hieu ve cam luc va trinh dai ((cua tre) or (su triet))*.