Perhaps you should try some spelling variations:
chuong trinh » cong trinh
chuong tinh » khuong tinh, thuong tinh, phuong trinh
soi viet » hoi viet, oi viet, doi viet
cay lanh » cao lan, cay lam
cay dan » cac dan
tinh ca » tinh cao, tinh cua, tinh va
cac cay » ca cay, cac cap, cac cau
cac cam » cad cam, cac cap, cac cau
so viet » hoc viet
ca dan » cac dan, ca dao
dan va » doan va, dan ca, ban va

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( chuong trinh ((cay dan) or (cay lanh)) va ((cac cay) OR (cac cam)) co ((soi viet) or (so viet)) nam ) or ( chuong tinh ca dan va ((cac cay) OR (cac cam)) co ((soi viet) or (so viet)) nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( chuong trinh ((cay dan) OR (cay lanh)) va ((cac cay) OR (cac cam)) co ((soi viet) OR (so viet)) nam ) OR ( chuong tinh ca dan va ((cac cay) OR (cac cam)) co ((soi viet) OR (so viet)) nam ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( chuong trinh ((cay dan) or (cay lanh)) va ((cac cay) OR (cac cam)) co ((soi viet) or (so viet)) nam ) or ( chuong tinh ca dan va ((cac cay) OR (cac cam)) co ((soi viet) or (so viet)) nam ))*".