Perhaps you should try some spelling variations:
dan thanh » dang thanh, danh thanh, ban thanh
hieu van » thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
thuc dan » thuc hanh, hoc dan, thuc vat
thanh va » thanh van, hanh va, thanh ha
sinh ky » sinh ly, sinh y, kinh ky
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
va cua » va chua, via cua, ca cua
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sinh ky nang x hoi. ((hieu ve) or (((hieu van) or (hieu va)))) nam thuc dan thanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sinh ky nang x hoi. ((hieu ve) OR (((hieu van) OR (hieu va)))) nam thuc dan thanh va cua tre.
• Adding a wildcard symbol may retrieve word variants: hoc sinh ky nang x hoi. ((hieu ve) or (((hieu van) or (hieu va)))) nam thuc dan thanh va cua tre*.