Perhaps you should try some spelling variations:
sach thame » sach thue
sach tham » sach nha
cham luc » cham soc, nhan luc, cham cuu
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
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 thame)) nang x hoi. hieu va cham luc ((va hanh) OR (va danh)) tri cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach tham) OR (sach thame)) nang x hoi. hieu va cham luc ((va hanh) OR (va danh)) tri cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach tham) or (sach thame)) nang x hoi. hieu va cham luc ((va hanh) OR (va danh)) tri cua tu".
• Adding a wildcard symbol may retrieve word variants: te ((sach tham) or (sach thame)) nang x hoi. hieu va cham luc ((va hanh) OR (va danh)) tri cua tu*.