Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
hieu van » hieu va, thien van, lieu va
nang ro » nang co, nang ho, nang ra
cam thu » nam thu, cac thu, ca thu
cua tuc » cua tu, cua thuoc, luat tuc
cua duc » cua nuoc, cua quoc
vu sac » vu sach, vu san, va sac
sac ky » cac ky, sai ky
ro hai » co hai, o hai, so hai

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 ro hai. hieu van ((am thuc) or (cam thu)) gia thanh hai ((cua tuc) or (cua duc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ky nang ro hai. hieu van ((am thuc) OR (cam thu)) gia thanh hai ((cua tuc) OR (cua duc)).
• Adding a wildcard symbol may retrieve word variants: vu sac ky nang ro hai. hieu van ((am thuc) or (cam thu)) gia thanh hai ((cua tuc) or (cua duc))*.