Perhaps you should try some spelling variations:
tu cach » tu cac
te sach » toc sach
nang co » nang cao, nang doc, nang noi
hieu va » lieu va
va danh » va dinh, va dan, va hanh
danh hu » danh hau, danh tu, danh du
cua tre » cua te, cuu tre, cua triet
co loi » co hoi
hu cua » tu cua, vu cua
nuoc » quoc, duoc, ngoc

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (te sach)) ky nang co loi. ((hieu va) OR (hieu qua)) hoc nuoc va danh hu cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (te sach)) ky nang co loi. ((hieu va) OR (hieu qua)) hoc nuoc va danh hu cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (te sach)) ky nang co loi. ((hieu va) OR (hieu qua)) hoc nuoc va danh hu cua tre*.