Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
cong ngang » cong nhan, cong quang, cong lang
dieu danh » tieu danh, dia danh, dien anh
trinh cua » tinh cua, trinh luat, trinh quan
cua thong » cua thuong, cua khong, cua tong
cong vang » cong lang, cong quang, cong san
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((dieu hanh) or (dieu danh)) - hanh trinh cua thong ((cong vang) OR (cong ngang)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((dieu hanh) OR (dieu danh)) - hanh trinh cua thong ((cong vang) OR (cong ngang)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((dieu hanh) or (dieu danh)) - hanh trinh cua thong ((cong vang) OR (cong ngang)) toan tap".
• Adding a wildcard symbol may retrieve word variants: theo ((dieu hanh) or (dieu danh)) - hanh trinh cua thong ((cong vang) OR (cong ngang)) toan tap*.