Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
hoc thieu » toc thieu, hoc hien
quang ban » quang binh, quang tuan, quang tran
cong tuan » cong tan, cong luan, cong thanh
lanh ban » lanh bang, lang ban, doanh ban
quan ban » qua ban, quan van, luan ban
cong tac » cong ty
phan dau » phan tu, hang dau

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tinh - lanh ban ((quan ban) OR (quang ban)) ((cong tac) OR (cong tuan)) phan dau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu tinh - lanh ban ((quan ban) OR (quang ban)) ((cong tac) or (cong tuan)) phan dau~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - lanh ban ((quan ban) OR (quang ban)) ((cong tac) or (cong tuan)) phan dau*.