Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thanh vi » hanh vi, thanh va, thanh ve
ky dang » ky nang, ky danh
cua tre » cuu tre, cua triet, dua tren
van cam » van nam, van lam, van cau
dang ha » dong ha, dung ha, lang ha
thuc va » thuc vat, thuc dan, thuc day
cua te » cua tu
tuc va » truc va, tuc xa, duc va
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: tu cac ky dang ha hoi. hieu van cam ((tuc va) OR (thuc va)) thanh vi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky dang ha hoi. hieu van cam ((tuc va) OR (thuc va)) thanh vi ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky dang ha hoi. hieu van cam ((tuc va) OR (thuc va)) thanh vi ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: tu cac ky dang ha hoi. hieu van cam ((tuc va) OR (thuc va)) thanh vi ((cua tre) or (cua te))*.