Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, chat lua
cham cuu » cap cuu, chat cua
hanh dau » hang dau, danh dau, han dau
cua viet » ca viet, hoa viet, cua vat
te sach » toc sach
tang xa » trang xa, tang ma, lang xa
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
dau cua » dai cua, day cua, cau 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) or (cham cuu)) va hanh dau 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) OR (cham cuu)) va hanh dau cua viet.
• Adding a wildcard symbol may retrieve word variants: te sach y tang xa hoi. hieu ve ((cham luc) or (cham cuu)) va hanh dau cua viet*.