Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
su triet » su viet, su tien, ve triet
su sach » vu sach
so sach » so sanh, bo sach, co sach
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
tuc van » thuc van, truc van, tuc va
hanh di » hanh vi, hanh de, hang di
ve cam » ve cham, ve cac, va cam
x hoi » xa hoi, o hoi, x ho
di su » doi su, ki su, da su

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 (so sach)) ky nang x hoi. hieu ve cam tuc van hanh di su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky nang x hoi. hieu ve cam tuc van hanh di su triet*.