Perhaps you should try some spelling variations:
nhung duong » nhung dung, nhung huong, nhung tuong
chieu sang » chieu sach, chieu xanh, hieu lang
chiet tach » chieu sach
trinh chat » tinh chat, trinh luat, trinh phan
duong tinh » duong minh, duong sinh, dong tinh
trinh han » trinh quan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sang) or (chiet tach)) - hanh ((trinh chat) OR (trinh han)) nhung duong tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sang) OR (chiet tach)) - hanh ((trinh chat) OR (trinh han)) nhung duong tinh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sang) or (chiet tach)) - hanh ((trinh chat) OR (trinh han)) nhung duong tinh toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) or (chiet tach)) - hanh ((trinh chat) OR (trinh han)) nhung duong tinh toan cau*.