Perhaps you should try some spelling variations:
te sach » toc sach
sach ky » sac ky, sach y, sach ty
dinh vi » dinh ve, dinh viet, dinh tri
va dinh » van dinh, va kinh, va tinh
cau hoc » cau hoi, cau hoa, cao hoc
cau loc » hau loc, cau luc, cau long
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma
vi cua » vai cua, di cua

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)) ((cau loc) or (cau hoc)) va dinh vi cua 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)) ((cau loc) OR (cau hoc)) va dinh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. ((hieu ve) or (hieu va)) ((cau loc) or (cau hoc)) va dinh vi cua tre*.