Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
cau tren » cu tren, dau tren, ca tren
viec cac » vien cac, viec cua, viec lam
danh vai » danh sai, danh va, doanh van
van danh » van doanh, van anh, van hanh
vai cau » va cau, van cau, vai cac
tu sach » thu sach, su sach, te sach
nang xa » lang xa, nang ma, mang xa
cac vo » cac co, cac vi, cac bo
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) OR (nang x)) hoi. hieu viec cac vo van danh vai cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu sach)) ky ((nang xa) OR (nang x)) hoi. hieu viec cac vo van danh vai cau tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) or (tu sach)) ky ((nang xa) OR (nang x)) hoi. hieu viec cac vo van danh vai cau tren*".