Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
ban hang » ngan hang
va danh » va dinh, va dan, va hanh
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
su tien » su kien, su hien, tu tieng
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam
ki su » ky su

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 y nang xa hoi. hieu ((ve cam) or (vien cac)) xuc ((va danh) or (ban hang)) ki su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu ((ve cam) OR (vien cac)) xuc ((va danh) OR (ban hang)) ki su tien.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu ((ve cam) or (vien cac)) xuc ((va danh) or (ban hang)) ki su tien*.