Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
duong tinh » duong minh, duong sinh, dong tinh
mot chieu » doi chieu, ho chieu
quan dong » quang dong, quan hoang, quan trong
quan long » quan lang, quan hoang, quan trong
toan cau » toan cao, toan ban, toan tap
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((mot chieu) or (doi chi)) xanh - hanh trinh ((quan dong) OR (quan long)) duong tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((mot chieu) OR (doi chi)) xanh - hanh trinh ((quan dong) OR (quan long)) duong tinh toan cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((mot chieu) or (doi chi)) xanh - hanh trinh ((quan dong) OR (quan long)) duong tinh toan cau*".