Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
vien cac » vien bach, vien dai, vien da
viec va » vien va, viec cua, viec lam
nang xa » nang x, lang xa, mang xa
hanh va » hang va, hanh vi
nang ma » tang ma, sang ma, nang cao
luc van » luoc van, luu van, duc van
va cua » va chua, via cua, ca cua
vu san » va san, vu ban
san ky » sang ky, van ky, dan ky
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: vu san ky ((nang xa) OR (nang ma)) hoi. hieu ((viec va) or (vien cac)) luc van hanh va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu san ky ((nang xa) OR (nang ma)) hoi. hieu ((viec va) OR (vien cac)) luc van hanh va cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu san ky ((nang xa) OR (nang ma)) hoi. hieu ((viec va) or (vien cac)) luc van hanh va cua te*".