Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cham luc » cham soc, nhan luc, cham cuu
lang dau » hang dau, xang dau, nang dau
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 lang » va nang, hoa lang
y tang » ky tang, 6 tang, 7 tang
ma hoi » mai hoi, xa hoi, ma hoa
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 hoi. hieu vu cham luc va lang dau ((cua triet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y tang ma hoi. hieu vu cham luc va lang dau ((cua triet) OR (cua vat)).
• Adding a wildcard symbol may retrieve word variants: te sach y tang ma hoi. hieu vu cham luc va lang dau ((cua triet) or (cua vat))*.