Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien danh
cong duong » cuong duong, cong dong, con duong
duong manh » duong van
thien anh » thien danh, tien anh, thien thanh
truong ca » truong cao, trong ca, truong dai
truong va » truong dai, truong cao, truong dao
manh toan » thanh toan, anh tuan, tinh toan
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: hoc ((thieu xanh) OR (thien anh)) - hanh ((truong ca) or (truong va)) cong duong manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (thien anh)) - hanh ((truong ca) OR (truong va)) cong duong manh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (thien anh)) - hanh ((truong ca) or (truong va)) cong duong manh toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (thien anh)) - hanh ((truong ca) or (truong va)) cong duong manh toan ban*.