Perhaps you should try some spelling variations:
dua tren » dung tren
hanh vai » hanh vi, hanh va, hanh tai
cao thuc » cao thuoc, bao thuc, can thuc
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
cua tre » cuu tre, cua triet, cua thep
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
tu nang » tru nang, tu nong, tu nano
va cao » va cac, va co, va dao
cua te » cua tu

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 tu nang xa hoi. hieu va cao thuc va hanh vai ((((cua tre) OR (dua tren))) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu nang xa hoi. hieu va cao thuc va hanh vai ((((cua tre) OR (dua tren))) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tu nang xa hoi. hieu va cao thuc va hanh vai ((((cua tre) OR (dua tren))) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: te sach tu nang xa hoi. hieu va cao thuc va hanh vai ((((cua tre) OR (dua tren))) or (cua te))*.