Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
thien hieu » thien nhien, thien chien, thien hue
theo hieu » theo chieu, theo tieu, thuc hieu
trinh vat » trinh van, trinh luat, sinh vat
hang cong » dang cong, hang nong, bang cong
hach toan » thanh toan, manh toan
toan ban » van ban

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) OR (thien hieu)) lang - hanh trinh vat ((hang cong) or (trong cong)) hach toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo hieu) OR (thien hieu)) lang - hanh trinh vat ((hang cong) OR (trong cong)) hach toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo hieu) OR (thien hieu)) lang - hanh trinh vat ((hang cong) or (trong cong)) hach toan ban".
• Adding a wildcard symbol may retrieve word variants: ((theo hieu) OR (thien hieu)) lang - hanh trinh vat ((hang cong) or (trong cong)) hach toan ban*.