Perhaps you should try some spelling variations:
thien dang » thien bang, thien danh, thien nang
chieu sach » chinh sach, chiet tach, chieu sang
doanh hoan » doanh doanh, doanh khoa, doanh nhan
va thong » va thuong, va phuong, he thong
cong tap » cuong tap, cong tan, tong tap
cong tac » cong ty
toan cau » toan cao, toan ban, toan tap
hoan va » khoan va, hoang va, doan va

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