Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
ban hang » ngan hang
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
ve cam » ve cham, ve cac, va cam
vi cua » vai cua, di cua
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: tu sach ky nang xa hoi. hieu ((ve cam) or (vien cac)) xuc ((va thanh) or (ban hang)) vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu ((ve cam) OR (vien cac)) xuc ((va thanh) OR (ban hang)) vi cua te.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu ((ve cam) or (vien cac)) xuc ((va thanh) or (ban hang)) vi cua te*.