Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
hieu van » hieu va, thien van, lieu va
thuc day » thuc dan, thuc vat
tu dang » thu dang, tu dong, su dang
dang ky » dang y, dan ky, dong ky
nang xa » nang x, lang xa, nang ma
truc va » thuc va, thuc vat, trung va
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 dang ky nang xa hoi. hieu van dao ((truc va) or (thuc day)) thanh hai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu dang ky nang xa hoi. hieu van dao ((truc va) OR (thuc day)) thanh hai cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu dang ky nang xa hoi. hieu van dao ((truc va) or (thuc day)) thanh hai cuu tre*.