Perhaps you should try some spelling variations:
thuc van » thuc vat, thuc va, thuc hanh
thuc dan » thuc hanh, hoc dan, thuc vat
hoc anh » hoc nganh, hoc nhanh, ngoc anh
xang xa » lang xa, mang xa, ang xa
hieu va » hieu qua
cua tre » cua te, cuu tre, cua triet
anh ty » anh tuy, anh tu, anh ta
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: hoc anh ty xang xa hoi. ((hieu va) OR (lieu va)) doan ((thuc van) or (thuc dan)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc anh ty xang xa hoi. ((hieu va) OR (lieu va)) doan ((thuc van) OR (thuc dan)) hanh vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc anh ty xang xa hoi. ((hieu va) OR (lieu va)) doan ((thuc van) or (thuc dan)) hanh vi cua tre*".