Perhaps you should try some spelling variations:
thien van » thi van
toc sach » hoc sach, doc sach, thuoc sach
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
lam xuc » lam duoc
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
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: ((tu sach) or (toc sach)) ky nang xa hoi. thien van ((lam xuc) or (cam xuc)) va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (toc sach)) ky nang xa hoi. thien van ((lam xuc) OR (cam xuc)) va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (toc sach)) ky nang xa hoi. thien van ((lam xuc) or (cam xuc)) va hanh vi cua tre*.