Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
nho chieu » nho hieu, theo chieu, nhat chieu
ho chieu » theo chieu, hoc thieu, doi chieu
quan ban » quang ban, qua ban, quan van
ban cong » bang cong, van cong, phan cong
tac tren » rac tren, tap tren, tac truyen
tai tren » thai tren, thi tren, gai tren

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (nho chieu)) quang - hanh trinh quan ban cong ((tac tren) or (tai tren)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (nho chieu)) quang - hanh trinh quan ban cong ((tac tren) OR (tai tren)) cau.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (nho chieu)) quang - hanh trinh quan ban cong ((tac tren) or (tai tren)) cau*.