Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
nung giang » huong giang, hong giang, ninh giang
hanh nung » hanh nhung, hanh dung, hanh tung
bang cong » dang cong, bang song, dung cong
hang cong » dang cong, hang nong, thanh cong
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu xanh) or (chieu sach)) - hanh nung giang ((bang cong) OR (hang cong)) tinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sach)) - hanh nung giang ((bang cong) OR (hang cong)) tinh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (chieu sach)) - hanh nung giang ((bang cong) OR (hang cong)) tinh toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chieu sach)) - hanh nung giang ((bang cong) OR (hang cong)) tinh toan ban*.