Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
vat hanh » vat thanh, van hanh, va hanh
thu sac » thu sach, thu san, thu xac
nang co » nang cao, nang doc, nang noi
hieu ve » hieu va, hieu van
sac ky » cac ky, sai ky
co hoi » co hoc, co loi
ve nam » he nam, va nam, le nam
vi cau » ve cau, di cau, viet cau
va cau » van cau, va cac, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sac ky nang co hoi. hieu ve nam thuc vat hanh ((vi cau) OR (va cau)) tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sac ky nang co hoi. hieu ve nam thuc vat hanh ((vi cau) OR (va cau)) tren".
• Adding a wildcard symbol may retrieve word variants: thu sac ky nang co hoi. hieu ve nam thuc vat hanh ((vi cau) OR (va cau)) tren*.