Perhaps you should try some spelling variations:
sieu viet » su viet, dien viet, bien viet
viet dat » viec dat, viet da, viet dao
danh voi » hanh voi, lanh voi, hanh vi
sach thu » sach thue, sach thieu, sach tham
te sach » toc sach
tang ma » mang may, tang van
bang ma » bang may, ban ma, nang ma
so viet » hoc viet
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
voi so » noi so, voi ho, hoi so

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach thu ((bang ma) or (tang ma)) hoa. sieu viet dat ((xuc va) or (tuc va)) danh voi so viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach thu ((bang ma) OR (tang ma)) hoa. sieu viet dat ((xuc va) OR (tuc va)) danh voi so viet.
• Adding a wildcard symbol may retrieve word variants: te sach thu ((bang ma) or (tang ma)) hoa. sieu viet dat ((xuc va) or (tuc va)) danh voi so viet*.