Perhaps you should try some spelling variations:
thuat thuc » thuat thuy, thuyet thuc, thuc thuc
thuat sach » thuat lanh, thuat san
hieu van » thien van, lieu va, hieu ve
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
va dan » ca dan, va dao, va dau

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

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