Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, nhung don
hanh hang » thanh hang, hang hang, hanh han
hang cong » dang cong, hang nong, bang cong
chu xanh » chu manh, chieu xanh, chua xang
hang cua » mang cua, hang ca, huong cua
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 ((chu xanh) or (chieu sach)) - hanh hang cua ((nhung cong) OR (hang cong)) tinh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu xanh) OR (chieu sach)) - hanh hang cua ((nhung cong) OR (hang cong)) tinh toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu xanh) or (chieu sach)) - hanh hang cua ((nhung cong) OR (hang cong)) tinh toan cao".
• Adding a wildcard symbol may retrieve word variants: theo ((chu xanh) or (chieu sach)) - hanh hang cua ((nhung cong) OR (hang cong)) tinh toan cao*.