Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
viec cac » viec cua, viec lam, viec va
hanh vai » hanh vi, hanh tai, hanh van
vu sang » vua sang, vu dang, vu san
hanh va » hang va, hanh vi
sang ky » sang kyo, dang ky, tang ky
luc va » duc va, tuc va, loc va
cua te » cua tu
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: vu sang ky nang x hoi. hieu ((viec cac) or (vien cac)) luc va ((hanh vai) OR (hanh va)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sang ky nang x hoi. hieu ((viec cac) OR (vien cac)) luc va ((hanh vai) OR (hanh va)) cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sang ky nang x hoi. hieu ((viec cac) or (vien cac)) luc va ((hanh vai) OR (hanh va)) cua te*".