Perhaps you should try some spelling variations:
doanh van » doan van, doanh ban, doanh nhan
toc sach » hoc sach, doc sach, thuoc sach
doanh va » doan va, doanh tai, doanh cua
truc va » thuc va, thuc vat, trung va
van bao » van ban, van dao
van bac » van ban, van hac, dan bac
nang ma » tang ma, sang ma, nang cao
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach y nang ma hoi. hieu ((van bac) or (van bao)) truc va ((doanh van) OR (doanh va)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y nang ma hoi. hieu ((van bac) OR (van bao)) truc va ((doanh van) OR (doanh va)) cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y nang ma hoi. hieu ((van bac) or (van bao)) truc va ((doanh van) OR (doanh va)) cua te*".