Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
va thanh » gia thanh, ban thanh, va tinh
thanh ve » hanh ve, thanh va, thanh vien
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
ve cac » va cac
luc va » duc va, tuc va, loc va
ve cua » le cua, de cua, te cua
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: so sach ty nang x hoi. hieu ((ve cac) or (vien cac)) luc va thanh ve cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty nang x hoi. hieu ((ve cac) OR (vien cac)) luc va thanh ve cua te.
• Adding a wildcard symbol may retrieve word variants: so sach ty nang x hoi. hieu ((ve cac) or (vien cac)) luc va thanh ve cua te*.