Perhaps you should try some spelling variations:
chat thuc » thuat thuc, nhan thuc, chat thai
thu sach » tu sach, thuat sach, thuoc sach
hieu cac » hieu luc, hieu van, vien cac
danh dai » danh dau, danh di, danh sai
cua tre » cua te, cua triet, dua tren
va danh » va dinh, va dan, va hanh
thuc va » thuc vat, thuc dan, thuc day
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
cuu tre » cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang xa hoi. ((hieu cac) or (hieu va)) chat thuc va danh dai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang xa hoi. ((hieu cac) OR (hieu va)) chat thuc va danh dai ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. ((hieu cac) or (hieu va)) chat thuc va danh dai ((cua tre) or (cuu tre))*.