Perhaps you should try some spelling variations:
thanh dong » thanh duong, thanh cong, nhanh dong
hanh dong » anh dong, ha dong
hang cong » dang cong, hang nong, bang cong
doc hieu » hoc thieu, hoc hien
cua hang » cua dang, cua nhung, cua cong
cong bai » cuong bai, cong hai, cung bai
bai toan » bai tap
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: ((doc hieu) OR (toc thieu)) xanh - ((thanh dong) or (hanh dong)) cua hang cong bai toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (toc thieu)) xanh - ((thanh dong) OR (hanh dong)) cua hang cong bai toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) OR (toc thieu)) xanh - ((thanh dong) or (hanh dong)) cua hang cong bai toan ban".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) OR (toc thieu)) xanh - ((thanh dong) or (hanh dong)) cua hang cong bai toan ban*.