Perhaps you should try some spelling variations:
thu nang » thi nang, thu hang, tho nang
thu bang » thu ban, thu hang, chu bang
cham luc » cham soc, nhan luc, cham cuu
te sach » toc sach
hieu va » lieu va, hieu qua
tai cua » thai cua, tai cuc, tri cua
van tai » von tai, van tuan
va cham » va chat, va tham
cua duc » cua tuc, cua nuoc, cua quoc
luc va » duc va, tuc va, loc va
x hoi » xa hoi, o hoi, 5 hoi

You may be able to get more results by adjusting your search query.

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