Perhaps you should try some spelling variations:
qua cham » qua hai, qua cac, va cham
cham luc » cham soc, nhan luc, cham cuu
toc sach » hoc sach, doc sach, thuoc sach
thu nang » thi nang, thu hang, thu bang
hanh di » hanh de, hang di, danh di
luc van » luoc van, luu van, duc van
nang xa » nang x, lang xa, nang ma
cua te » cua tu

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