Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
doanh dao » doanh bao, doanh cao, doanh giao
hieu van » thien van, lieu va, hieu ve
danh day » danh dau, dan day, lanh dao
nhan luc » nang luc
hieu va » lieu va, hieu qua
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 van) or (hieu va)) nhan luc va ((danh day) OR (doanh dao)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y tang ma hoi. ((hieu van) OR (hieu va)) nhan luc va ((danh day) OR (doanh dao)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y tang ma hoi. ((hieu van) or (hieu va)) nhan luc va ((danh day) OR (doanh dao)) cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach y tang ma hoi. ((hieu van) or (hieu va)) nhan luc va ((danh day) OR (doanh dao)) cua triet*.