Perhaps you should try some spelling variations:
trinh quan » tinh quang, trinh luat, trinh han
hanh trinh » canh tranh, hanh chinh
tong huong » thong huong, tong thuong, cong huong
quan tong » quan trong, quan dong, quan long
phan cau » phan dau, phan tu, phan lap
phan cac » nhan cach, phan dau, phan lap
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: ((doi chi) or (hoc hien)) xanh - hanh trinh quan tong huong dan ((phan cau) OR (phan cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chi) OR (hoc hien)) xanh - hanh trinh quan tong huong dan ((phan cau) OR (phan cac)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chi) or (hoc hien)) xanh - hanh trinh quan tong huong dan ((phan cau) OR (phan cac))".
• Adding a wildcard symbol may retrieve word variants: ((doi chi) or (hoc hien)) xanh - hanh trinh quan tong huong dan ((phan cau) OR (phan cac))*.