Perhaps you should try some spelling variations:
doanh luan » doanh nhan
luan cua » quan cua, lua cua, luat cua
hieu van » hieu va, thien van, lieu va
te sach » toc sach
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
van cac » van hac, van cau, van bac
nang xa » nang x, lang xa, nang ma
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
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: te sach ky nang xa hoi. hieu van cac ((((xuc va) OR (tuc va))) or (loc va)) doanh luan cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. hieu van cac ((((xuc va) OR (tuc va))) OR (loc va)) doanh luan cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang xa hoi. hieu van cac ((((xuc va) OR (tuc va))) or (loc va)) doanh luan cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. hieu van cac ((((xuc va) OR (tuc va))) or (loc va)) doanh luan cua tre*.