Perhaps you should try some spelling variations:
doanh dao » doanh bao, doanh cao, doanh giao
su triet » su viet, su tien, ve triet
hieu van » hieu va, thien van, lieu va
danh day » danh dau, dan day, lanh dao
cham luc » cham soc, nhan luc, cham cuu
hieu ve » hieu va
tang ma » mang may, tang van
te sach » toc sach
y tang » ky tang, 6 tang, 7 tang
luc va » duc va, tuc va, loc va
ma hoi » mai hoi, xa hoi, ma hoa

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