Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
cua viet » ca viet, cua vat, cua dieu
danh dau » lanh dao, hang dau, danh tu
te sach » toc sach
va danh » va dinh, va dan, va hanh
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
tang ma » tang van
luc va » duc va, tuc va, loc va

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