Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hieu lang » chieu sang, hieu quang, nhieu tang
quang ban » quang binh, quang tuan, quang tran
tac trien » tac tren, tac truyen, tac tuyen
trien cac » thien cac, trien cam, trien cay
quan ban » quan van, luan ban, quan ba
cong tac » cong ty
ho hieu » ho chieu, hoi hieu, nho hieu
qua ban » cua ban, qua quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - hanh trinh ((((quan ban) OR (qua ban))) or (quang ban)) cong tac trien cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh trinh ((((quan ban) OR (qua ban))) OR (quang ban)) cong tac trien cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - hanh trinh ((((quan ban) OR (qua ban))) or (quang ban)) cong tac trien cac".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh trinh ((((quan ban) OR (qua ban))) or (quang ban)) cong tac trien cac*.