Perhaps you should try some spelling variations:
nhung duong » nhung dung, nhung huong, nhung tuong
thieu khang » chieu khong, thieu quang
chieu sach » chinh sach, chiet tach, chieu sang
cua nhung » va nhung
duong anh » duong manh, duong xanh, duong vanh
quang cao » nang cao, quang nam
mang cua » manh cua, dung cua, ban cua
quan cau » toan cau, quan ha, quan cua

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 khang) or (chieu sach)) - cach mang cua nhung duong anh ((quan cau) OR (quang cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu khang) OR (chieu sach)) - cach mang cua nhung duong anh ((quan cau) OR (quang cao))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu khang) or (chieu sach)) - cach mang cua nhung duong anh ((quan cau) OR (quang cao))*".