Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
vay doanh » van doanh, ly doanh, voi doanh
thu sach » thuat sach, thuoc sach, thu hoach
thuc vay » thuc vat, thuc day, thuc va
tu sach » su sach, te sach, tu cach
va cham » va chat, va tham
van cuu » van cau, van chu, van cu
va nham » va tham, va nha, va kham
nang ma » tang ma, sang ma, nang cao
cuu tre » cua tre, cau tren, cau treo
ma hoi » mai hoi, xa hoi, ma hoa

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)) ky nang ma hoi. hieu ((va nham) OR (va cham)) thuc vay doanh van cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang ma hoi. hieu ((va nham) OR (va cham)) thuc vay doanh van cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) ky nang ma hoi. hieu ((va nham) OR (va cham)) thuc vay doanh van cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky nang ma hoi. hieu ((va nham) OR (va cham)) thuc vay doanh van cuu tre*.