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

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 lam duc van thanh pho ((dua tren) or (cau 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 lam duc van thanh pho ((dua tren) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: so sanh tu ((nang ma) or (tang ma)) hoi. thien van lam duc van thanh pho ((dua tren) or (cau tren))*.