Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
chua xang » chua nang, chuc nang, chu bang
trinh cua » tinh cua, trinh luat, trinh quan
dung cong » dung trong
chu xanh » chu manh, chieu xanh, chuc danh
cua dung » cua dang, cua dong, qua dung
tap toan » tap doan, tap quan
bai toan » bai tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: chao ((chu xanh) OR (chua xang)) - hanh trinh cua dung cong ((tap toan) or (bai toan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: chao ((chu xanh) OR (chua xang)) - hanh trinh cua dung cong ((tap toan) OR (bai toan)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "chao ((chu xanh) OR (chua xang)) - hanh trinh cua dung cong ((tap toan) or (bai toan)) tap".
• Adding a wildcard symbol may retrieve word variants: chao ((chu xanh) OR (chua xang)) - hanh trinh cua dung cong ((tap toan) or (bai toan)) tap*.