Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
danh bat » doanh bat, anh bai, dinh ba
danh vai » danh sai, danh va, doanh van
sach ky » sac ky, sach y, sach ty
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
o hai » co hai, so hai, o lai
o hoi » co hoi, o hoc, o hoa
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 ky nang ((o hoi) or (o hai)). hieu ve am thuc va ((danh vai) or (danh bat)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((o hoi) OR (o hai)). hieu ve am thuc va ((danh vai) OR (danh bat)) cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((o hoi) or (o hai)). hieu ve am thuc va ((danh vai) or (danh bat)) cua triet*.