Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cac truc » cau truc, cac tru, cac trung
van hanh » van thanh, ban hanh, van ban
sach thu » sach thue, sach thieu, sach tham
van anh » van thanh, tuan anh, van minh
sach ty » sach y, sach tu, xach tay
hieu ve » hieu va, hieu van
le cua » ly cua
ve cac » va cac, vien cac
x hoi » xa hoi, o hoi, x ho

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 ty) or (sach thu)) nang x hoi. hieu ve cac truc ((van hanh) or (van anh)) le cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach thu)) nang x hoi. hieu ve cac truc ((van hanh) OR (van anh)) le cua triet.
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (sach thu)) nang x hoi. hieu ve cac truc ((van hanh) or (van anh)) le cua triet*.