Perhaps you should try some spelling variations:
shoi viet » hoi viet, thoai viet, hoc viet
trinh le » thinh le, trinh he, trinh ke
trinh do » trinh ky
loi viet » loai viet, hoi viet, oi viet
trinh ly » trinh ky, trinh tu, sinh ly
co shoi » co hoi, co khoi
mot loi » mot loai, cot loi, mot doi
tay mot » tai mot, tay vuot
so viet » hoc viet
cot soi » cot loi, cong soi
cac tay » cac cay, cac tac, cac tai
le dan » ke dan
co soi » co hoi, co loi, co doi
do anh » do sanh, do danh
anh va » hanh va
cac ty » cac ky, cac tu
dan va » doan va, dan ca, ban va
dai va » mai va

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((( cong trinh le dan va cac tay ((co soi) OR (cot soi)) viet nam ) or ( cong trinh ly dai va cac tay mot loi viet nam ))) or ((( cong trinh do anh va cac ty co shoi viet nam ) or ( cong trinh do anh va cac ty co so viet nam ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( cong trinh le dan va cac tay ((co soi) OR (cot soi)) viet nam ) OR ( cong trinh ly dai va cac tay mot loi viet nam ))) OR ((( cong trinh do anh va cac ty co shoi viet nam ) OR ( cong trinh do anh va cac ty co so viet nam ))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( cong trinh le dan va cac tay ((co soi) OR (cot soi)) viet nam ) or ( cong trinh ly dai va cac tay mot loi viet nam ))) or ((( cong trinh do anh va cac ty co shoi viet nam ) or ( cong trinh do anh va cac ty co so viet nam ))))*".