Perhaps you should try some spelling variations:
dinh vai » dinh van, dinh vi, dinh va
te sach » toc sach
ky dang » ky danh
hieu ve » hieu van
hieu va » lieu va, hieu qua
cao hoc » co hoc, cho hoc, chat hoc
va dinh » van dinh, va kinh, va tinh
vai cuu » vai cua
cuu tre » cua 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: te sach ((ky dang) OR (ky nang)) xa hoi. ((hieu ve) or (hieu va)) cao hoc va dinh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky dang) OR (ky nang)) xa hoi. ((hieu ve) OR (hieu va)) cao hoc va dinh vai cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky dang) OR (ky nang)) xa hoi. ((hieu ve) or (hieu va)) cao hoc va dinh vai cuu tre*".