Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
danh vai » danh sai, danh va, dang van
tu sach » thu sach, su sach, tu cach
nang xa » nang x, lang xa, nang ma
te sach » toc sach
cac ly » cac ky, cac le, cam ly
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) or (te sach)) ky nang xa hoi. hieu vien cac ly va ((danh vai) OR (doanh van)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky nang xa hoi. hieu vien cac ly va ((danh vai) OR (doanh van)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) ky nang xa hoi. hieu vien cac ly va ((danh vai) OR (doanh van)) cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky nang xa hoi. hieu vien cac ly va ((danh vai) OR (doanh van)) cua te*.