Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh vai » hanh vi, hanh va, hanh tai
ban hanh » ban hang
thuc ban » thuoc ban, thuc dan, thu ban
nam thuc » nam thuoc, am thuc, nam thu
hieu he » hiem he, hieu le, hieu hien
vai cua » dai cua, hai cua, lai cua
te sach » toc sach
hieu ve » hieu va, hieu van
hoa hoi » khoa hoi, hoa hoc, hoa doi
ky lang » ky dang, ky tang, tay lang

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 ((ky lang) or (ky nang)) hoa hoi. ((hieu ve) or (hieu he)) nam thuc ban hanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky lang) OR (ky nang)) hoa hoi. ((hieu ve) OR (hieu he)) nam thuc ban hanh vai cua triet.
• Adding a wildcard symbol may retrieve word variants: te sach ((ky lang) or (ky nang)) hoa hoi. ((hieu ve) or (hieu he)) nam thuc ban hanh vai cua triet*.