Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
danh dan » danh dau, canh dan, dang dan
su triet » su viet, su tien, ve triet
te sach » toc sach
tang ma » tang van
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va danh » va dinh, va dan, va hanh
luc va » duc va, tuc va, loc va
dan su » dang su

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 dan su triet~.
• 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 dan su triet.
• Adding a wildcard symbol may retrieve word variants: te sach y ((tang ma) or (mang may)) hoi. hieu ve cham luc va danh dan su triet*.