Perhaps you should try some spelling variations:
thien van » thi van
danh cong » dang cong, hanh cong, anh cong
cong cua » cong cu, dong cua, huong cua
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » lang xa, nang ma, mang xa
van cac » van hac, van cau, van bac
cua tre » cua te, cuu tre, cua triet
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 ky ((nang xa) or (nang x)) hoi. thien van cac ((xuc va) OR (luc va)) danh cong cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((nang xa) OR (nang x)) hoi. thien van cac ((xuc va) OR (luc va)) danh cong cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((nang xa) or (nang x)) hoi. thien van cac ((xuc va) OR (luc va)) danh cong cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang xa) or (nang x)) hoi. thien van cac ((xuc va) OR (luc va)) danh cong cua tre*.