Perhaps you should try some spelling variations:
phuong cham » phuong phap, phuong thao
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
tranh cua » doanh cua
dung cong » dung trong
cong bang » cuong bang, dong bang, hong bang
manh cua » doanh cua, ban cua

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) OR (chieu sach)) - canh ((tranh cua) or (manh cua)) dung cong bang phuong cham~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (chieu sach)) - canh ((tranh cua) OR (manh cua)) dung cong bang phuong cham.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sang) OR (chieu sach)) - canh ((tranh cua) or (manh cua)) dung cong bang phuong cham".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) OR (chieu sach)) - canh ((tranh cua) or (manh cua)) dung cong bang phuong cham*.