Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
sach ty » sach y, sach tu, sach thu
danh vi » dinh vi, danh di, danh va
su sach » so sach, vu sach
ty nang » ky nang, ty xang, ty hang
ve cac » va cac
xuc va » duc va, tuc va, luc 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: su sach ty nang x hoi. hieu ((ve cac) or (vien cac)) xuc va ((danh vi) or (hanh vi)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang x hoi. hieu ((ve cac) OR (vien cac)) xuc va ((danh vi) OR (hanh vi)) cua te.
• Adding a wildcard symbol may retrieve word variants: su sach ty nang x hoi. hieu ((ve cac) or (vien cac)) xuc va ((danh vi) or (hanh vi)) cua te*.