Perhaps you should try some spelling variations:
thien van » thi van
van thanh » ban thanh, van tuan
dua tren » dung tren
duc van » duc va, duc tan, duc manh
cau duc » cao duc, cau luc, chu duc
van cau » van dau, van hau, van chat
so sanh » do sanh
sanh tu » anh tu, danh tu, hanh tu
tang ma » mang may, tang van
nang ma » sang ma, nang cao, mang may
cu tren » tu tren

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh tu ((nang ma) or (tang ma)) hoi. thien van cau duc van thanh pho ((dua tren) or (cu tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh tu ((nang ma) OR (tang ma)) hoi. thien van cau duc van thanh pho ((dua tren) OR (cu tren)).
• Adding a wildcard symbol may retrieve word variants: so sanh tu ((nang ma) or (tang ma)) hoi. thien van cau duc van thanh pho ((dua tren) or (cu tren))*.