Perhaps you should try some spelling variations:
viet cua » viec cua, biet cua, nhiet cua
viet qua » vien quan, ket qua, viet ha
te sach » toc sach
nang xa » nang x, lang xa, nang ma
qua cac » cua cac
cac vuc » cac nuoc, cac vung, cac cuoc
vuc van » duc van, luc van, thuc van
van anh » van thanh, tuan anh, van minh
viet ca » viet ha, viet co, viet a
sach 2 » sach y
2 nang » v 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 2 nang xa hoi. hieu qua cac vuc van anh ((((viet cua) or (viet ca))) or (viet qua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach 2 nang xa hoi. hieu qua cac vuc van anh ((((viet cua) OR (viet ca))) OR (viet qua)) triet.
• Adding a wildcard symbol may retrieve word variants: te sach 2 nang xa hoi. hieu qua cac vuc van anh ((((viet cua) or (viet ca))) or (viet qua)) triet*.