Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
van danh » van doanh, van anh, van hanh
danh vai » danh sai, danh va, doanh van
cau tren » cu tren, dau tren, ca tren
tu sach » thu sach, su sach, te sach
vai cau » va cau, van cau, vai cac
y nang » ky nang, ly nang, v nang
cac so » cac co, cac bo, cac o
cac ho » cac hop, cac hoc, cac co
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu viec ((cac so) or (cac ho)) van danh vai cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang x hoi. hieu viec ((cac so) OR (cac ho)) van danh vai cau tren*.