Perhaps you should try some spelling variations:
doanh vai » doanh tai, doanh va, doanh van
van doanh » toan doanh, van dong, van thanh
cau tren » cu tren, dau tren, ca tren
vien cac » vien bach, vien dai, vien da
viec cac » viec cua, viec lam, viec va
nang xa » nang x, lang xa, nang ma
tu sach » thu sach, su sach, te sach
vai cau » va cau, van cau, vai cac
tu sac » tu cac, tu san, tu bac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sac) or (tu sach)) ky nang xa hoi. hieu ((viec cac) OR (vien cac)) vo van doanh vai cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu sach)) ky nang xa hoi. hieu ((viec cac) OR (vien cac)) vo van doanh vai cau tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) or (tu sach)) ky nang xa hoi. hieu ((viec cac) OR (vien cac)) vo van doanh vai cau tren*".