Perhaps you should try some spelling variations:
thanh tinh » thanh binh, nhanh tinh, than kinh
duong manh » duong van
hieu sang » chieu sang, hieu lang, hieu quang
cua nhung » va nhung
cong manh » cong danh, cong thanh, hoang manh
doc hieu » toc thieu, hoc thieu, hoc hien
tinh cua » trinh cua, sinh cua, tinh chat
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 - thanh tinh cua nhung ((cong manh) OR (duong manh)) toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu sang - thanh tinh cua nhung ((cong manh) OR (duong manh)) toan cao".
• Adding a wildcard symbol may retrieve word variants: doc hieu sang - thanh tinh cua nhung ((cong manh) OR (duong manh)) toan cao*.