Perhaps you should try some spelling variations:
thai cua » than cua, tai cuc, tri cua
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
cac thu » cach thuc, cac thoi
cach tu » cach thuc
va hanh » van hanh, va thanh, va danh
tai cua » tai cuc, tri cua, dai cua
x hoi » xa hoi, o hoi, x ho

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

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