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
nang xa » nang x, lang xa, nang ma
van hau » van ha, van hai, van dau
truc va » thuc va, thuc vat, trung va
hai cuu » hai cua, hai chu, hai cuc
cuu tre » cua tre, cau tren, cau treo
tu sac » tu sach, tu san, tu bac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sac) OR (tu cac)) ky nang xa hoi. hieu van hau ((truc va) or (thuc dan)) thanh hai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu cac)) ky nang xa hoi. hieu van hau ((truc va) OR (thuc dan)) thanh hai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) OR (tu cac)) ky nang xa hoi. hieu van hau ((truc va) or (thuc dan)) thanh hai cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) OR (tu cac)) ky nang xa hoi. hieu van hau ((truc va) or (thuc dan)) thanh hai cuu tre*.