Perhaps you should try some spelling variations:
van triet » va triet, van thiet, van trieu
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang 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 cac » va cac, vien cac
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: su sach ty xang xa hoi. hieu ((ve cac) or (ve cham)) tuc van hanh vu van triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty xang xa hoi. hieu ((ve cac) OR (ve cham)) tuc van hanh vu van triet.
• Adding a wildcard symbol may retrieve word variants: su sach ty xang xa hoi. hieu ((ve cac) or (ve cham)) tuc van hanh vu van triet*.