Perhaps you should try some spelling variations:
thieu xanh » hieu manh, thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh hang » thanh hang, hang hang, hanh han
va phuong » va thuong, cac phuong
cong nang » cong ngang, cong lang, cong nong
nang quan » ban quan, nang suat
va thong » va thuong, he thong, va cong
quan cau » quang cao, toan cau, quan ha

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 (chieu xanh)) - hanh hang ((va thong) or (va phuong)) cong nang quan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu xanh)) - hanh hang ((va thong) OR (va phuong)) cong nang quan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (chieu xanh)) - hanh hang ((va thong) or (va phuong)) cong nang quan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (chieu xanh)) - hanh hang ((va thong) or (va phuong)) cong nang quan cau*.