Perhaps you should try some spelling variations:
hieu quan » lieu quan, thien quan, lien quan
danh vi » hanh vi, dinh vi, danh di
thuc va » thuc vat, thuc dan, thuc day
truc va » thuc vat, trung va
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
vi cua » vai cua, di cua

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 v nang xa hoi. ((hieu quan) or (hieu qua)) chat ((truc va) or (thuc va)) danh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach v nang xa hoi. ((hieu quan) OR (hieu qua)) chat ((truc va) OR (thuc va)) danh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach v nang xa hoi. ((hieu quan) or (hieu qua)) chat ((truc va) or (thuc va)) danh vi cua tre*.