Perhaps you should try some spelling variations:
thien chinh » tien thinh, thien chien, thi chinh
nhung cong » dung cong, thong cong, hang cong
hoang van » hang va
cong tan » cong tac, cong san, cong thanh
toan cau » toan cao, toan tap, toan tai
toan ban » van ban
tang va » trang va, tang van, thang va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thien chinh sach - anh ((tang va) or (hoang van)) nhung cong tan ((toan cau) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thien chinh sach - anh ((tang va) OR (hoang van)) nhung cong tan ((toan cau) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thien chinh sach - anh ((tang va) or (hoang van)) nhung cong tan ((toan cau) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: thien chinh sach - anh ((tang va) or (hoang van)) nhung cong tan ((toan cau) OR (toan ban))*.