Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thuc day » thuc dan, thuc vat
thuc va » thuc vat, thuc dan
vu sac » vu sach, vu san, va sac
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, me hoi
van am » van nam, van lam, van dam
vi cua » vai cua, di cua
cua te » cua tu

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 ((ma hoi) or (ma hoa)). hieu van am ((thuc va) OR (thuc day)) hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ky nang ((ma hoi) OR (ma hoa)). hieu van am ((thuc va) OR (thuc day)) hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sac ky nang ((ma hoi) or (ma hoa)). hieu van am ((thuc va) OR (thuc day)) hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: vu sac ky nang ((ma hoi) or (ma hoa)). hieu van am ((thuc va) OR (thuc day)) hanh vi cua te*.