Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, hieu manh
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh trang » thanh trung, canh tranh, hanh trinh
nam thang » nam thanh, nam trong, nam trung
cong hach » cong sach, cong thanh, cong khanh
hach toan » thanh toan, manh toan
tam hang » pham hang, tam huong, thai hang
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 tinh)) - hanh trang ((tam hang) or (nam thang)) cong hach toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu tinh)) - hanh trang ((tam hang) OR (nam thang)) cong hach toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) OR (chieu tinh)) - hanh trang ((tam hang) or (nam thang)) cong hach toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) OR (chieu tinh)) - hanh trang ((tam hang) or (nam thang)) cong hach toan ban*.