Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
lang van » dang van, tang van, hoang van
thanh vi » hanh vi, thanh va, thanh ve
tu sach » thu sach, su sach, te sach
mang xa » lang xa, mang may, dang xay
hieu va » lieu va, hieu qua
va cham » va chat, va tham
soc van » hoc van, oc van, sac van
luu tre » luu tru, cuu tre, luy tre
vi luu » vi lua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y ((mang xa) or (lang van)) hoi. hieu va cham soc van thanh vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((mang xa) OR (lang van)) hoi. hieu va cham soc van thanh vi luu tre*.