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
thong cong » trong cong, tong cong, thong thong
va thong » va thuong, va phuong, he thong
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
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 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 toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien dang) or (chieu sach)) - doanh hoan va thong cong tap toan cau*.