Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
duc tre » duoc tren, duc tien
van tai » von tai, van tuan
cac luc » cau luc, coc luc, cac nuoc
hieu ve » hieu va, hieu van
danh ma » anh ma, hanh ma, danh va
danh ca » dan ca, doanh cua, danh cho
sai ky » sac ky
ve cac » va cac, vien cac
luc va » duc va, tuc va, loc va
su sai » su tai, su hai, su dai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sai ky ((danh ma) or (danh ca)) hoi. hieu ve cac luc va ((thanh tai) or (van tai)) duc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sai ky ((danh ma) OR (danh ca)) hoi. hieu ve cac luc va ((thanh tai) OR (van tai)) duc tre.
• Adding a wildcard symbol may retrieve word variants: su sai ky ((danh ma) or (danh ca)) hoi. hieu ve cac luc va ((thanh tai) or (van tai)) duc tre*.