Perhaps you should try some spelling variations:
tu cach » tu cac
te sach » toc sach
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
va chua » vua chua, ca chua, va chu
va cua » via cua, ca cua, ma cua
x hoi » xa hoi, o hoi, x ho
ve am » va am

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (te sach)) ky nang x hoi. hieu ve am thuc va danh ((va cua) OR (va chua)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (te sach)) ky nang x hoi. hieu ve am thuc va danh ((va cua) OR (va chua)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (te sach)) ky nang x hoi. hieu ve am thuc va danh ((va cua) OR (va chua)) viet".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (te sach)) ky nang x hoi. hieu ve am thuc va danh ((va cua) OR (va chua)) viet*.