Perhaps you should try some spelling variations:
phuong cham » phuong phap, phuong thao
chieu tach » chiet tach, chiu trach, chieu tinh
chieu sach » chinh sach, chiet tach, chieu sang
phuong la » phuong lan, phuong tay, phuong mai
dung cong » dung trong
cong van » cong vang, cong san, song van
van tan » van tuan, van ban, van tai
tan cau » toan cau, van cau, tan ca

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 tach) OR (chieu sach)) - thanh ((phuong cham) or (phuong la)) dung cong van tan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu tach) OR (chieu sach)) - thanh ((phuong cham) OR (phuong la)) dung cong van tan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu tach) OR (chieu sach)) - thanh ((phuong cham) or (phuong la)) dung cong van tan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu tach) OR (chieu sach)) - thanh ((phuong cham) or (phuong la)) dung cong van tan cau*.