Perhaps you should try some spelling variations:
ve triet » va trien, su triet
dang xay » dang van, van xay
cua tre » cua te, cuu tre, cua triet
va hanh » van hanh, va thanh, va danh
sach ty » sach y, sach tu, sach thu
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va

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 ((nang ma) or (dang xay)) hoi. hieu va cam xuc va hanh vi ((cua tre) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((nang ma) OR (dang xay)) hoi. hieu va cam xuc va hanh vi ((cua tre) OR (ve triet)).
• Adding a wildcard symbol may retrieve word variants: su sach ty ((nang ma) or (dang xay)) hoi. hieu va cam xuc va hanh vi ((cua tre) or (ve triet))*.