Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
viec cac » vien cac, viec cua, viec lam
van danh » van doanh, van anh, van hanh
danh van » doanh van, dang van, dinh van
cau tren » cu tren, dau tren, ca tren
nang ma » tang ma, nang cao, mang may
sang ma » tang ma, sang tao, mang may
van cau » van dau, van hau, van chat
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
cac vo » cac co, cac vi, cac bo

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((nang ma) OR (sang ma)) hoi. hieu viec cac vo van danh van cau tren~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((nang ma) OR (sang ma)) hoi. hieu viec cac vo van danh van cau tren*.