Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nang dau » hang dau, xang dau, nang du
sach ty » sach tu, sach thu, xach tay
dau hoi » cau hoi, dai hoi, dan hoi
qua cam » qua cham, qua cac, qua ca
cam tuc » cam xuc, cam tu, nam thuc
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
tuc va » thuc va, truc va, tuc xa
va cua » va chua, via cua, ca cua

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

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