Perhaps you should try some spelling variations:
khong minh » thong minh, hoang minh, duong minh
cong thong » cong thuong, cong trong, dong thong
giao cong » gia cong, giao thong, cao cong
con khong » cong khong, con hong, cuong khong
gian con » gian cuon, gian co, gian don
mach cua » manh cua, menh cua, hanh cua
hoa van » hoa dan, hoang van, hoa phan
su mach » su sach
tu sach » thu sach, su sach, te sach
ve gian » ve giao, va gian, ve giai
ha van » nha van, va van, ho van
cua ve » cua vi, cua te, cua vu
tin » tinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( su mach cua ve gian con khong minh ) or ( tu sach ((ha van) OR (hoa van)) giao cong thong tin ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su mach cua ve gian con khong minh ) OR ( tu sach ((ha van) OR (hoa van)) giao cong thong tin )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( su mach cua ve gian con khong minh ) or ( tu sach ((ha van) OR (hoa van)) giao cong thong tin ))".
• Adding a wildcard symbol may retrieve word variants: (( su mach cua ve gian con khong minh ) or ( tu sach ((ha van) OR (hoa van)) giao cong thong tin ))*.