Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
hieu van » hieu va, thien van, lieu va
nang ho » nang hoc, nang co, tang ho
ca thuc » can thuc, cay thuc, va thuc
hai cua » thai cua, dai cua, hoi cua
vu sac » vu sach, vu san, va sac
sac ky » cac ky, sai ky
nang o » nang co, nang ro, nang x
ca thu » cac thu, cam thu, ca tru
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sac ky ((nang o) OR (nang ho)) hai. hieu van ((ca thuc) or (ca thu)) gia thanh hai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ky ((nang o) OR (nang ho)) hai. hieu van ((ca thuc) OR (ca thu)) gia thanh hai cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sac ky ((nang o) OR (nang ho)) hai. hieu van ((ca thuc) or (ca thu)) gia thanh hai cua tu".
• Adding a wildcard symbol may retrieve word variants: vu sac ky ((nang o) OR (nang ho)) hai. hieu van ((ca thuc) or (ca thu)) gia thanh hai cua tu*.