Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
hieu van » hieu va, thien van, lieu va
thuc dan » thuc hanh, hoc dan, thuc vat
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
van hau » van ha, van hai, van dau
thuc va » thuc vat, thuc day
hai cuu » hai cua, hai chu, hai cuc
cuu tre » cua tre, cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (tu cac)) ky nang xa hoi. hieu van hau ((thuc va) or (thuc dan)) thanh hai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (tu cac)) ky nang xa hoi. hieu van hau ((thuc va) OR (thuc dan)) thanh hai cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (tu cac)) ky nang xa hoi. hieu van hau ((thuc va) or (thuc dan)) thanh hai cuu tre*.