Perhaps you should try some spelling variations:
sach doi » sach hoi, sach moi, sach dao
dang xay » dang van, van xay
dich duc » dinh duc, dich nuoc, dich vu
vu sach » vu bach, su sach, vu khach
lang xa » lang ha, lang van
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
tuc van » thuc van, truc van, tuc va
duc cua » doc cua, luc cua, tuc cua
va cam » va cham, va cac, va cao
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach doi ((lang xa) or (dang xay)) hoi. hieu va cam tuc van dich duc cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach doi ((lang xa) OR (dang xay)) hoi. hieu va cam tuc van dich duc cua te.
• Adding a wildcard symbol may retrieve word variants: vu sach doi ((lang xa) or (dang xay)) hoi. hieu va cam tuc van dich duc cua te*.