Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
huong dang » huong dan, duong dang, huong dong
hien xanh » hien nhanh, chieu xanh, hien khanh
hien hanh » dieu hanh
quan dong » quang dong, quan hoang, quan trong
quan long » quan lang, quan hoang, quan trong
dang van » hoang van, hang va

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien xanh) or (hien hanh)) - hanh trinh ((quan dong) OR (quan long)) huong dang van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien hanh)) - hanh trinh ((quan dong) OR (quan long)) huong dang van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (hien hanh)) - hanh trinh ((quan dong) OR (quan long)) huong dang van ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (hien hanh)) - hanh trinh ((quan dong) OR (quan long)) huong dang van ban*.