Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
sach tu » sach thu, cach tu, sach ty
nang ma » tang ma, sang ma, nang cao
qua cam » qua cham, qua cac, qua ca
xuc van » duc van, luc van, vuc van
cua tre » cua te, cuu tre, dua tren
ma hoi » mai hoi, xa hoi, ma hoa

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