Perhaps you should try some spelling variations:
thuat sac » thuat sach, thuat san, thuat tac
tam thuc » tham thuc, am thuc, nam thuc
mai hoi » mai khoi, dai hoi, lai hoi
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
sac ky » cac ky, sai ky
ma hoi » xa hoi, ma hoa, me hoi
va tam » van tam, va tham, va tac
vi cua » vai cua
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sac ky nang ((ma hoi) or (mai hoi)). lieu va tam thuc va hanh ((vi cua) OR (di cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sac ky nang ((ma hoi) OR (mai hoi)). lieu va tam thuc va hanh ((vi cua) OR (di cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sac ky nang ((ma hoi) or (mai hoi)). lieu va tam thuc va hanh ((vi cua) OR (di cua)) triet".
• Adding a wildcard symbol may retrieve word variants: thuat sac ky nang ((ma hoi) or (mai hoi)). lieu va tam thuc va hanh ((vi cua) OR (di cua)) triet*.