Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
nhan luc » nang luc
te sach » toc sach
hanh ve » hanh vi, hanh va, hanh kem
hanh le » thanh le, hanh de, manh le
cua tre » cua te, cuu tre, cua triet
cau luc » cau truc, cau phuc
nang xa » nang x, lang xa, nang ma
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang

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 v nang xa hoi. hieu van ((nhan luc) or (cau luc)) van ((hanh le) OR (hanh ve)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach v nang xa hoi. hieu van ((nhan luc) OR (cau luc)) van ((hanh le) OR (hanh ve)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach v nang xa hoi. hieu van ((nhan luc) or (cau luc)) van ((hanh le) OR (hanh ve)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach v nang xa hoi. hieu van ((nhan luc) or (cau luc)) van ((hanh le) OR (hanh ve)) cua tre*.