Perhaps you should try some spelling variations:
vay doanh » van doanh, ly doanh, voi doanh
doanh dao » doanh bao, doanh cao, doanh giao
te sach » toc sach
van hac » van hoc, van ha, van hai
dao cua » dai cua, day cua, dan cua
toc vay » toc tay, toc va, toc giay
van bac » van ban, van bao, dan bac
sach ky » sac ky, sach y, sach ty
van cac » van cau, dan cac, van ca
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
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: te sach ky lang xa hoi. hieu ((((van cac) OR (van bac))) or (van hac)) toc vay doanh dao cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky lang xa hoi. hieu ((((van cac) OR (van bac))) OR (van hac)) toc vay doanh dao cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky lang xa hoi. hieu ((((van cac) OR (van bac))) or (van hac)) toc vay doanh dao cua te*".