Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh trinh » canh tranh, hanh chinh
thong cong » trong cong, tong cong, thong thong
trinh cua » tinh cua, trinh luat, trinh quan
cua thong » cua thuong, cua khong, cua tong
cong nang » cong ngang, cong lang, cong nong
quan cao » quang cao, quan ao, juan cao
quan cau » quang cao, toan cau, quan ha

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 (dieu hanh)) - hanh trinh cua thong cong nang ((quan cao) OR (quan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (dieu hanh)) - hanh trinh cua thong cong nang ((quan cao) OR (quan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (dieu hanh)) - hanh trinh cua thong cong nang ((quan cao) OR (quan cau))".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (dieu hanh)) - hanh trinh cua thong cong nang ((quan cao) OR (quan cau))*.