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
trien cac » trien cam, trien cay, truyen cac
thien cac » hien cac, thien cau, thieu cac
quan ban » qua ban, quan van, luan ban
cong tac » cong ty
ho hieu » ho chieu, hoi hieu, nho hieu

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