Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu xanh » chieu sang, chieu tinh
hanh trang » thanh trung, canh tranh, hanh trinh
nhung cong » dung cong, thong cong, hang cong
hieu manh » hieu nganh, dieu hanh, hien hanh
cong hinh » cong vinh, cong tinh, hong hinh
hinh toan » tinh toan, thanh toan, trinh toan
trang va » tran van, hang va
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 (chieu xanh))) or (chieu sach)) - hanh trang va nhung cong hinh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((((hieu manh) OR (chieu xanh))) OR (chieu sach)) - hanh trang va nhung cong hinh toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((((hieu manh) OR (chieu xanh))) or (chieu sach)) - hanh trang va nhung cong hinh toan cao".
• Adding a wildcard symbol may retrieve word variants: theo ((((hieu manh) OR (chieu xanh))) or (chieu sach)) - hanh trang va nhung cong hinh toan cao*.