Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
sach thu » sach thue, sach thieu, sach tham
thu hanh » thuc hanh, thu thanh, thuy hanh
van hanh » van thanh, ban hanh, van anh
thai cua » than cua, tai cuc, tri cua
tu sach » thu sach, su sach, te sach
hanh xa » hanh va, hanh ma, hanh xu
hieu ve » hieu va, hieu van
va hanh » va thanh, va danh, ban hanh
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 thu hanh xa hoi. hieu ve am thuc ((va hanh) or (van hanh)) thai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thu hanh xa hoi. hieu ve am thuc ((va hanh) OR (van hanh)) thai cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach thu hanh xa hoi. hieu ve am thuc ((va hanh) or (van hanh)) thai cua triet*.