Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hieu manh » chieu xanh, hieu nganh, hien hanh
hanh tang » hanh trang, anh tang, hanh mang
dung cong » dung trong
tang cua » mang cua, hang cua, tang luan
cua dung » cua dang, cua dong, qua dung
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai 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 ((((hieu manh) or (dieu hanh))) or (chieu sach)) - hanh tang cua dung cong tap toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((((hieu manh) OR (dieu hanh))) OR (chieu sach)) - hanh tang cua dung cong tap toan cau.
• Adding a wildcard symbol may retrieve word variants: theo ((((hieu manh) or (dieu hanh))) or (chieu sach)) - hanh tang cua dung cong tap toan cau*.