Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
tu doanh » su doanh, ty doanh, tri doanh
te doanh » te danh, de doanh, ty doanh
trinh do » trinh ky
doanh _ » doanh va, doanh co, doanh ha
lu hanh » luu hanh, du hanh, ly hanh
do khi » doi khi, do thi, co khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( ((tu doanh) OR (te doanh)) doanh _ khi đong luc ) or ( lu hanh trinh do khi đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( ((tu doanh) OR (te doanh)) doanh _ khi đong luc ) OR ( lu hanh trinh do khi đong luc )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((tu doanh) OR (te doanh)) doanh _ khi đong luc ) or ( lu hanh trinh do khi đong luc ))".
• Adding a wildcard symbol may retrieve word variants: (( ((tu doanh) OR (te doanh)) doanh _ khi đong luc ) or ( lu hanh trinh do khi đong luc ))*.