Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh lai » hanh lam, hanh tai, thanh lap
cua tre » cua te, cuu tre, dua tren
va hanh » van hanh, va thanh, va danh
cam tuc » cam xuc, cam tu, nam thuc
sach ty » sach y, sach tu, sach thu
sach uu » sach luu, sach tu, sach xu
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
nang o » nang co, nang ho, nang ro
tuc va » thuc va, truc va, tuc xa
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ty) or (sach uu)) nang o hoi. hieu ve cam tuc va hanh lai ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach uu)) nang o hoi. hieu ve cam tuc va hanh lai ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (sach uu)) nang o hoi. hieu ve cam tuc va hanh lai ((cua tre) or (cua triet))*.