Perhaps you should try some spelling variations:
thuat bang » thuat ban, thuat mang, thuat nang
thue bang » thu bang, thien bang, thuoc bang
van dinh » van minh, van dich, xuan dinh
te sach » toc sach
vai cua » dai cua, hai cua, lai cua
va dinh » va kinh, va tinh, vu dinh
cua tre » cua te, cuu tre, cua triet
co thuc » do thuc, co thua, mo thuc
hieu va » lieu va, hieu qua
va co » vo co

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 ((thue bang) OR (thuat bang)) xa hoi. hieu va co thuc ((va dinh) or (van dinh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((thue bang) OR (thuat bang)) xa hoi. hieu va co thuc ((va dinh) OR (van dinh)) vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((thue bang) OR (thuat bang)) xa hoi. hieu va co thuc ((va dinh) or (van dinh)) vai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((thue bang) OR (thuat bang)) xa hoi. hieu va co thuc ((va dinh) or (van dinh)) vai cua tre*.