Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
van doanh » toan doanh, van dong, van thanh
lang van » dang van, tang van, hoang van
cham luu » cham cuu, chat lua, phap luu
vu sach » vu bach, su sach, vu khach
hieu va » lieu va, hieu qua
van chu » van chi, van phu, van cau
luu van » cuu van, luan van, luu hanh
chu tre » cho tre, chu tri, cuu tre
hieu vu » hieu ve, hieu su, dieu vu
nang xa » nang x, lang xa, nang ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach y ((nang xa) or (lang van)) hoi. ((hieu vu) OR (hieu va)) cham luu van doanh van chu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y ((nang xa) OR (lang van)) hoi. ((hieu vu) OR (hieu va)) cham luu van doanh van chu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y ((nang xa) or (lang van)) hoi. ((hieu vu) OR (hieu va)) cham luu van doanh van chu tre*".