Perhaps you should try some spelling variations:
van triet » va triet, van thiet, van trieu
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky danh » ky anh, ky dang
danh xa » danh ca, dinh xa, canh xa
ve cham » va cham, ve chat, vu cham
tuc van » thuc van, truc van, tuc va
hanh vu » hanh vi, hanh va, hanh tu
ve cam » ve cac, va cam, ve cai
vu van » tu van

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 ky danh xa hoi. hieu ((ve cam) or (ve cham)) tuc van hanh vu van triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky danh xa hoi. hieu ((ve cam) OR (ve cham)) tuc van hanh vu van triet*.