Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
nang dai » nang dau, nang tai, lang dai
sach thu » sach thue, sach thieu, sach tham
dai hoi » dai hoc, dai hai, dai moi
sach ty » sach y, sach tu, xach tay
xuc van » duc van, luc van, vuc van
cua tre » cua te, cuu tre, dua tren
qua ca » qua cac, qua cua, qua cai
ca xuc » cam xuc, chat xuc

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 thu)) nang dai hoi. hieu qua ca xuc van hanh vi ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach thu)) nang dai hoi. hieu qua ca xuc van hanh vi ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (sach thu)) nang dai hoi. hieu qua ca xuc van hanh vi ((cua tre) or (cua triet))*.