Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
thu nang » thi nang, thu hang, thu bang
cham luc » cham soc, nhan luc, cham cuu
te sach » toc sach
hieu va » lieu va, hieu qua
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
hai cua » thai cua, dai cua, hoi cua
lai cua » dai cua, lai chau, thai cua
luc va » duc va, tuc va, loc va
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu va cham luc va hanh ((hai cua) or (lai cua)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach thu nang x hoi. hieu va cham luc va hanh ((hai cua) OR (lai cua)) tu.
• Adding a wildcard symbol may retrieve word variants: te sach thu nang x hoi. hieu va cham luc va hanh ((hai cua) or (lai cua)) tu*.