Perhaps you should try some spelling variations:
phuong thao » phuong phap, phuong thuc
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
huong thao » thuong thay, luong theo, hong thai
tuong cong » truong cong, trong cong, tong cong
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cau » toan cau, phan cau, than cap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu xanh) or (chieu sang)) - thanh ((huong thao) OR (phuong thao)) tuong cong tan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (chieu sang)) - thanh ((huong thao) OR (phuong thao)) tuong cong tan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu xanh) or (chieu sang)) - thanh ((huong thao) OR (phuong thao)) tuong cong tan than cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (chieu sang)) - thanh ((huong thao) OR (phuong thao)) tuong cong tan than cau*.