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

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 ((((hieu luc) or (cau luc))) or (nhan luc)) van anh de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach v nang xa hoi. hieu van ((((hieu luc) OR (cau luc))) OR (nhan luc)) van anh de cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach v nang xa hoi. hieu van ((((hieu luc) or (cau luc))) or (nhan luc)) van anh de cua tre*.