Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
vu cham » va cham, vu kham, tu cham
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ve cham » va cham, ve chat, ve chim
ty nang » ky nang, ty xang, ty hang
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: su sach ty nang x hoi. hieu ((ve cham) OR (vu cham)) duc ((van hanh) or (ban hanh)) dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang x hoi. hieu ((ve cham) OR (vu cham)) duc ((van hanh) OR (ban hanh)) dai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang x hoi. hieu ((ve cham) OR (vu cham)) duc ((van hanh) or (ban hanh)) dai cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang x hoi. hieu ((ve cham) OR (vu cham)) duc ((van hanh) or (ban hanh)) dai cua triet*.