Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
doanh van » doan van, doanh va, doanh ban
thi nang » thi cong, ki nang, thi hanh
danh vai » danh sai, danh va, dang van
sach thi » sach thu, sach tai, sach thieu
tu sach » thu sach, su sach, te sach
cao duc » dao duc, cao suc, giao duc
lai hoa » dai hoa, loai hoc
mai hoi » mai khoi, dai hoi, lai hoi
va cao » va cac, va co, va dao

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 thi nang ((mai hoi) or (lai hoa)). lieu va cao duc va ((danh vai) OR (doanh van)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thi nang ((mai hoi) OR (lai hoa)). lieu va cao duc va ((danh vai) OR (doanh van)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thi nang ((mai hoi) or (lai hoa)). lieu va cao duc va ((danh vai) OR (doanh van)) cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach thi nang ((mai hoi) or (lai hoa)). lieu va cao duc va ((danh vai) OR (doanh van)) cua triet*.