Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
cau treo » cau theo, cau tren, cau triet
thuc day » thuc dan, thuc vat
hieu van » hieu va, thien van, lieu va
hai cau » hai chau, hai chu, hai hau
truc va » thuc va, thuc vat, trung va
sang ky » sang kyo, tang ky, bang ky
lang xa » lang ha, dang xay, lang van
dang ky » dang y, dan ky, dong ky
van dau » van dao, phan dau

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) OR (dang ky)) lang xa hoi. hieu van dau ((truc va) or (thuc day)) thanh hai cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sang ky) OR (dang ky)) lang xa hoi. hieu van dau ((truc va) OR (thuc day)) thanh hai cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sang ky) OR (dang ky)) lang xa hoi. hieu van dau ((truc va) or (thuc day)) thanh hai cau treo".
• Adding a wildcard symbol may retrieve word variants: tu ((sang ky) OR (dang ky)) lang xa hoi. hieu van dau ((truc va) or (thuc day)) thanh hai cau treo*.