Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
va thanh » gia thanh, ban thanh, le thanh
vai cua » dai cua, hai cua, lai cua
va tinh » may tinh
va cham » va chat, va tham
hieu va » lieu va, hieu qua
cua tu » cua tuc, cua su, cua cu
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 tham) or (sach nha)) nang x hoi. hieu va cham luc ((va thanh) OR (va tinh)) vai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach tham) OR (sach nha)) nang x hoi. hieu va cham luc ((va thanh) OR (va tinh)) vai cua tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach tham) or (sach nha)) nang x hoi. hieu va cham luc ((va thanh) OR (va tinh)) vai cua tu*".