Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien danh
thien anh » thien danh, tien anh, thien thanh
tranh cua » doanh cua
dung cong » dung trong
manh cua » doanh cua, ban cua
cong do » cuong do, cong dot, cong so
do van » dao van, vo van, so van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu xanh) OR (thien anh)) - hanh ((tranh cua) or (manh cua)) dung cong do van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (thien anh)) - hanh ((tranh cua) OR (manh cua)) dung cong do van ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (thien anh)) - hanh ((tranh cua) or (manh cua)) dung cong do van ban*".