Perhaps you should try some spelling variations:
thu nang » thi nang, thu hang, tho nang
thu bang » thu ban, thu hang, chu bang
nhan luc » nang luc
cua nhan » ca nhan, cua ngan, cua nha
hieu cua » hieu qua, dieu cua, bieu cua
te sach » toc sach
tai cua » thai cua, tai cuc, tri cua
han tai » hang tai, nhan tai, van tai
luc va » duc va, tuc va, loc va
va han » va phan, van han, va hanh
cua tu » cua tuc, cua su, cua cu
x hoi » xa hoi, o hoi, 5 hoi

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 ((thu nang) OR (thu bang)) ((x hoi) or (x ho)). hieu cua nhan luc va han tai cua tu~.
• 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 cua nhan luc va han tai cua tu.
• 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 cua nhan luc va han tai cua tu".
• Adding a wildcard symbol may retrieve word variants: te sach ((thu nang) OR (thu bang)) ((x hoi) or (x ho)). hieu cua nhan luc va han tai cua tu*.