Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
nhu phuong » thu phuong, nhung phuong, thi phuong
phuong dan » phuong danh, phuong doan, huong dan
hoc chieu » hoc thieu, ho chieu, hoc hien
mang cua » manh cua, dung cua, ban cua
dan toan » van toan, dan than, manh toan
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: hoc chieu sang - hanh ((mang cua) or (dung luan)) nhu phuong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sang - hanh ((mang cua) OR (dung luan)) nhu phuong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sang - hanh ((mang cua) or (dung luan)) nhu phuong dan toan cao*.