Perhaps you should try some spelling variations:
phuong trinh » chuong trinh, cong trinh, huong tran
chieu sang » chieu sach, hieu lang, nhieu tang
chieu xanh » chieu sach, chieu tinh, hieu manh
nhu phuong » thu phuong, nhung phuong, thi phuong
trinh toan » tinh toan, thanh toan, trinh han
trang va » hang va
tran van » luan van
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: doc ((chieu sang) OR (chieu xanh)) - canh ((trang va) or (tran van)) nhu phuong trinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu sang) OR (chieu xanh)) - canh ((trang va) OR (tran van)) nhu phuong trinh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((chieu sang) OR (chieu xanh)) - canh ((trang va) or (tran van)) nhu phuong trinh toan ban".
• Adding a wildcard symbol may retrieve word variants: doc ((chieu sang) OR (chieu xanh)) - canh ((trang va) or (tran van)) nhu phuong trinh toan ban*.