Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
hieu viec » nhieu viec, hieu ve, sieu viet
cau treo » cau theo, cau tren, cau triet
danh vai » danh sai, danh va, dang van
viec cac » vien cac, viec cua, viec lam
ly nang » ky nang, ly hang, ly vang
tu sach » thu sach, su sach, te sach
v nang » va nang, vu nang, van nang
cac lo » cac lop, cac co, cac bo
lo van » le van, vo van, so van

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 ((ly nang) or (v nang)) xa hoi. hieu viec cac lo van ((danh vai) OR (doanh van)) cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ly nang) OR (v nang)) xa hoi. hieu viec cac lo van ((danh vai) OR (doanh van)) cau treo*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ly nang) or (v nang)) xa hoi. hieu viec cac lo van ((danh vai) OR (doanh van)) cau treo*".