Perhaps you should try some spelling variations:
dang hai » dang khai, hang hai, dung hai
cua viet » ca viet, cua vat, cua dieu
nam thuc » nam thuoc, am thuc, nam thu
nang hai » hang hai, nang tai, bang hai
thuc va » thuc vat, thuc dan, thuc day
ky lang » ky nang, ky dang, ky tang
lang ha » long ha
hieu ve » hieu va, hieu van
te sai » te tai, te bai, te lai
sai ky » sac ky
ve nam » he nam, va nam, le nam
ha hoi » hoa hoi, ha noi, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sai ky lang ha hoi. hieu ve nam thuc va ((nang hai) or (dang hai)) ((cua viet) or (hoa viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sai ky lang ha hoi. hieu ve nam thuc va ((nang hai) OR (dang hai)) ((cua viet) OR (hoa viet)).
• Adding a wildcard symbol may retrieve word variants: te sai ky lang ha hoi. hieu ve nam thuc va ((nang hai) or (dang hai)) ((cua viet) or (hoa viet))*.