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
cong tac » cong ty
ho hieu » ho chieu, hoi hieu, nho hieu
tac ten » tac tren, tac den, tac tuyen
ten cay » tren cay, gen cay, trien cay

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 ((quang ban) or (quan luan)) cong tac ten cay~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh trinh ((quang ban) OR (quan luan)) cong tac ten cay.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh trinh ((quang ban) or (quan luan)) cong tac ten cay*.