Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
chiet tach » chieu sach
thong cong » trong cong, tong cong, thong thong
cong manh » cong danh, duong manh, cong thanh
trung va » truong va, trang va, trung ha
va thong » va thuong, va phuong, he thong
toan cao » toan tap
toan ban » van ban

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)) - thanh trung va thong cong manh ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sang) OR (chiet tach)) - thanh trung va thong cong manh ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) or (chiet tach)) - thanh trung va thong cong manh ((toan cao) or (toan ban))*.