Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
cam tuc » cam xuc, cam tu, nam thuc
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
bo sach » co sach, hoc sach
voi su » voi suc, oi su, vi su
ve cam » ve cham, ve cac, va cam
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) or (bo sach)) ky nang x hoi. hieu ve cam tuc ((van hanh) OR (ban hanh)) voi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (bo sach)) ky nang x hoi. hieu ve cam tuc ((van hanh) OR (ban hanh)) voi su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (bo sach)) ky nang x hoi. hieu ve cam tuc ((van hanh) OR (ban hanh)) voi su triet*".