Perhaps you should try some spelling variations:
dinh vai » dinh van, dinh vi, dinh va
te sach » toc sach
cam hoc » am hoc, cam hoa, cac hoc
vai cuu » vai cua
va dinh » van dinh, va kinh, va tinh
cao hoc » co hoc, cho hoc, chat hoc
cuu tre » cua tre, cau tren, cau treo
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma

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 xa hoi. ((hieu ve) or (hieu va)) ((cam hoc) OR (cao hoc)) va dinh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. ((hieu ve) OR (hieu va)) ((cam hoc) OR (cao hoc)) va dinh vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang xa hoi. ((hieu ve) or (hieu va)) ((cam hoc) OR (cao hoc)) va dinh vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. ((hieu ve) or (hieu va)) ((cam hoc) OR (cao hoc)) va dinh vai cuu tre*.