Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
tru nang » tra nang, tri nang, truc nano
doanh va » doan va, doanh tai, doanh cua
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
duc van » duc va, duc tan, duc manh
va cua » va chua, via cua, ca cua
ve cao » va cao, ve bao, ve cac
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: ((tu sach) or (su sach)) tru nang xa hoi. hieu ((ve cao) or (va cac)) duc van doanh va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) tru nang xa hoi. hieu ((ve cao) OR (va cac)) duc van doanh va cua te.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) tru nang xa hoi. hieu ((ve cao) or (va cac)) duc van doanh va cua te*.