Perhaps you should try some spelling variations:
danh vai » danh sai, danh va, doanh van
thuc dan » thuc hanh, hoc dan, thuc vat
sach tu » sach thu, cach tu, sach ty
vai cua » dai cua, hai cua, lai cua
thuc va » thuc vat, thuc day
te sach » toc sach
nang xa » nang x, lang xa, nang ma
tu nang » tru nang, tu nong, tu nano
cua tre » cua te, cuu tre, cua triet
va do » va dao, va co, va de

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