Perhaps you should try some spelling variations:
thieu nang » thien nang, thieu khang, thieu quang
cham luc » cham soc, nhan luc, cham cuu
dieu cua » dieu tra
toc sach » hoc sach, doc sach, thuoc sach
qua cham » qua hai, qua cac, va cham
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
nang xa » nang x, lang xa, nang ma
cua su » qua su

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)) thieu nang xa hoi. hieu qua cham luc ((va hanh) or (va danh)) dieu cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) thieu nang xa hoi. hieu qua cham luc ((va hanh) OR (va danh)) dieu cua su.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) thieu nang xa hoi. hieu qua cham luc ((va hanh) or (va danh)) dieu cua su*.