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 sang » thu sang, tu san, tu lang
sang ky » sang kyo, dang ky, tang ky
nang xa » nang x, lang xa, nang ma
truc va » thuc va, thuc vat, trung va
hai chu » hai chau, hoi chu, hai chi
chu tre » cho tre, chu tri, cuu tre

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

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