Perhaps you should try some spelling variations:
hanh trong » hanh trang, anh trong, hinh trong
hieu sang » chieu sang, hieu lang, hieu quang
va phuong » va thuong, cac phuong
cong manh » duong manh, cong thanh, hoang manh
cong danh » cuong danh, cong dan, cong thanh
doc hieu » toc thieu, hoc thieu, hoc hien
trong va » trong van, trong ca, trong cac
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: doc hieu sang - hanh trong va phuong ((cong manh) or (cong danh)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sang - hanh trong va phuong ((cong manh) OR (cong danh)) toan cao*.