Perhaps you should try some spelling variations:
thien dang » thien bang, thien danh, thien nang
doanh hoan » doanh doanh, doanh khoa, doanh nhan
thong cong » trong cong, tong cong, thong thong
cong tac » cong ty
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap
hoan he » hoa he, toan he, hoan thue

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thien dang) or (chinh sach)) - doanh hoan he thong cong tac ((toan cau) OR (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien dang) OR (chinh sach)) - doanh hoan he thong cong tac ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien dang) or (chinh sach)) - doanh hoan he thong cong tac ((toan cau) OR (toan cao))".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien dang) or (chinh sach)) - doanh hoan he thong cong tac ((toan cau) OR (toan cao))*.