Perhaps you should try some spelling variations:
thien van » thi van
toc sach » hoc sach, doc sach, thuoc sach
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cua triet, dua tren
danh ca » dan ca, doanh cua, danh cho
cuu tre » cau tren, cau treo
van cac » van hac, van cau, van bac
nang xa » nang x, lang xa, nang ma
xuc va » duc va, tuc va, luc va
loc va » hoc va, luc va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky nang xa hoi. thien van cac ((xuc va) or (loc va)) danh ca ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang xa hoi. thien van cac ((xuc va) OR (loc va)) danh ca ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang xa hoi. thien van cac ((xuc va) or (loc va)) danh ca ((cua tre) or (cuu tre))*.