Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
danh dau » lanh dao, hang dau, danh tu
su triet » su viet, su tien, ve triet
cua viet » ca viet, hoa viet, cua vat
te sach » toc sach
tang ma » mang may, tang van
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
va danh » va dinh, va dan, va hanh
y tang » ky tang, 6 tang, 7 tang
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 hoa. hieu vu cham luc va danh dau ((su triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y tang ma hoa. hieu vu cham luc va danh dau ((su triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: te sach y tang ma hoa. hieu vu cham luc va danh dau ((su triet) or (cua viet))*.