Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hieu nganh » vien nganh, hiem ngan, hieu manh
hanh trang » thanh trung, canh tranh, hanh trinh
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
trang va » tran van, hang va
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (hieu nganh)) - hanh trang va ((hang cong) OR (dang cong)) tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (hieu nganh)) - hanh trang va ((hang cong) OR (dang cong)) tan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (hieu nganh)) - hanh trang va ((hang cong) OR (dang cong)) tan toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (hieu nganh)) - hanh trang va ((hang cong) OR (dang cong)) tan toan cau*.