Perhaps you should try some spelling variations:
hanh trinh » hanh chinh
hanh tranh » hanh trang, lanh tranh, nhanh thanh
thong cong » trong cong, tong cong, thong thong
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
cua thong » cua thuong, cua khong, cua tong
van tuyen » va tuyen, van chuyen, van nguyen
cong van » cong vang, cong san, song van

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo hieu lang - ((((hanh tranh) OR (hanh trinh))) or (canh tranh)) cua thong cong van tuyen tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - ((((hanh tranh) OR (hanh trinh))) OR (canh tranh)) cua thong cong van tuyen tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo hieu lang - ((((hanh tranh) OR (hanh trinh))) or (canh tranh)) cua thong cong van tuyen tap".
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - ((((hanh tranh) OR (hanh trinh))) or (canh tranh)) cua thong cong van tuyen tap*.