Perhaps you should try some spelling variations:
tcanh tranh » thanh thanh, can tranh, lanh tranh
chieu xanh » chieu sach, chieu sang, chieu tinh
thong cong » trong cong, tong cong, thong thong
hoc chieu » hoc thieu, ho chieu, hoc hien
cap thong » cap tong, chap thuong, phap thong
dan ban » van ban, dan ba, dan bac
can ban » van ban, toan 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 - ((canh tranh) or (tcanh tranh)) cap thong cong ((dan ban) or (can ban)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - ((canh tranh) OR (tcanh tranh)) cap thong cong ((dan ban) OR (can ban)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - ((canh tranh) or (tcanh tranh)) cap thong cong ((dan ban) or (can ban)) cau*.