Perhaps you should try some spelling variations:
thien van » thi van
cong cua » cong cu, dong cua, huong cua
anh cong » hanh cong, anh dong, thanh cong
tu sach » thu sach, su sach, te sach
van cac » van hac, van cau, van bac
cua tre » cua te, cuu tre, cua triet
nang xa » lang xa, nang ma, mang xa
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va

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 y ((nang xa) or (nang x)) hoi. thien van cac ((xuc va) or (luc va)) anh cong cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang xa) OR (nang x)) hoi. thien van cac ((xuc va) OR (luc va)) anh cong cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang xa) or (nang x)) hoi. thien van cac ((xuc va) or (luc va)) anh cong cua tre*.