Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
trang quan » trong quan, tang quan, trang tuan
duong cong » dung cong, duong trong, trong cong
luong cong » dung cong, trong cong, cong cong
chu xanh » chu manh, chieu xanh, chua xang
tac toan » tap toan, tam toan, hach toan
toan ban » van ban
chu han » chu van

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 (chu han)) - hanh trang quan ((duong cong) OR (luong cong)) tac toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu xanh) OR (chu han)) - hanh trang quan ((duong cong) OR (luong cong)) tac toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu xanh) or (chu han)) - hanh trang quan ((duong cong) OR (luong cong)) tac toan ban".
• Adding a wildcard symbol may retrieve word variants: theo ((chu xanh) or (chu han)) - hanh trang quan ((duong cong) OR (luong cong)) tac toan ban*.