Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
doanh van » doan van, doanh va, doanh ban
danh sai » dung sai, danh bat, danh dau
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai
ve am » va am

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty nang o hoi. hieu ve am thuc va ((doanh van) or (danh sai)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang o hoi. hieu ve am thuc va ((doanh van) OR (danh sai)) cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang o hoi. hieu ve am thuc va ((doanh van) or (danh sai)) cua triet*.