Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
thieu xanh » chieu xanh, hieu manh, thien anh
quan thong » quang thong, xuan thong, quang thang
quan trong » gian trong
cong tinh » cong trinh, cong vinh, long tinh
tien anh » tieng anh, tien manh, dien anh
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: hoc ((thieu xanh) or (tien anh)) - hanh trinh ((quan thong) OR (quan trong)) cong tinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (tien anh)) - hanh trinh ((quan thong) OR (quan trong)) cong tinh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (tien anh)) - hanh trinh ((quan thong) OR (quan trong)) cong tinh toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (tien anh)) - hanh trinh ((quan thong) OR (quan trong)) cong tinh toan ban*.