Perhaps you should try some spelling variations:
thanh dieu » thanh lieu, than dieu, hanh dieu
nang duoc » ngang duoc, nang doc, nganh duoc
thien van » thi van
duoc hoi » quoc hoi, duoc hoc, duoc si
nam thuc » nam thuoc, am thuc, nam thu
va thanh » gia thanh, ban thanh, va tinh
dieu tra » dieu tri, kiem tra, dieu cua
hieu va » hieu qua
thuc va » thuc vat, thuc dan, thuc day
so sac » so sach, so dac
sac ky » cac ky, sai ky
tra te » tra tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sac ky nang duoc hoi. ((((hieu va) or (lieu va))) or (thien van)) nam thuc va thanh dieu tra te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sac ky nang duoc hoi. ((((hieu va) OR (lieu va))) OR (thien van)) nam thuc va thanh dieu tra te.
• Adding a wildcard symbol may retrieve word variants: so sac ky nang duoc hoi. ((((hieu va) or (lieu va))) or (thien van)) nam thuc va thanh dieu tra te*.