Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
cau treo » cau theo, cau tren, cau triet
danh vai » danh sai, danh va, doanh van
van danh » van doanh, van anh, van hanh
thu sach » thuat sach, thuoc sach, thu hoach
nang ma » tang ma, sang ma, nang cao
cac lop » cac hop, cac loai
vai cau » va cau, van cau, vai cac
tu sach » su sach, te sach, tu cach
ma hoi » mai hoi, xa hoi, ma hoa
y nang » ky nang, ly nang, v nang
cac lo » cac co, cac bo, cac 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) or (thu sach)) y nang ma hoi. hieu viec ((cac lo) OR (cac lop)) van danh vai cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) y nang ma hoi. hieu viec ((cac lo) OR (cac lop)) van danh vai cau treo*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) y nang ma hoi. hieu viec ((cac lo) OR (cac lop)) van danh vai cau treo*".