Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
te sach » toc sach
tang xa » trang xa, tang ma, lang xa
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
dau cua » day cua, cau cua, dan cua
y tang » ky tang, 6 tang, 7 tang

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 y tang xa hoi. hieu ve cham luc ((va danh) OR (va hanh)) ((dau cua) or (dai cua)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y tang xa hoi. hieu ve cham luc ((va danh) OR (va hanh)) ((dau cua) OR (dai cua)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y tang xa hoi. hieu ve cham luc ((va danh) OR (va hanh)) ((dau cua) or (dai cua)) viet".
• Adding a wildcard symbol may retrieve word variants: te sach y tang xa hoi. hieu ve cham luc ((va danh) OR (va hanh)) ((dau cua) or (dai cua)) viet*.