Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
toc sach » hoc sach, doc sach, thuoc sach
danh dau » lanh dao, hang dau, danh tu
nhan luc » nang luc
su triet » su viet, su tien, ve triet
hieu ve » hieu va, hieu van
ve nhan » ve nha, de nhan, va nhan
va danh » va dinh, va dan, va hanh
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: toc sach y ((tang ma) or (mang may)) hoi. hieu ve nhan luc va danh dau ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y ((tang ma) OR (mang may)) hoi. hieu ve nhan luc va danh dau ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y ((tang ma) or (mang may)) hoi. hieu ve nhan luc va danh dau ((cua triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: toc sach y ((tang ma) or (mang may)) hoi. hieu ve nhan luc va danh dau ((cua triet) OR (su triet))*.