Perhaps you should try some spelling variations:
va thanh » ban thanh, va tinh, le thanh
dang xay » dang van, van xay
lam truc » lam truoc, nam truc, lam thuoc
cua tre » cua te, cuu tre, cua triet
lang xa » lang ha, lang van
vi cua » vai cua, di cua
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
va lam » van lam, va lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky ((lang xa) or (dang xay)) hoi. lieu va lam truc ((va thanh) OR (gia thanh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky ((lang xa) OR (dang xay)) hoi. lieu va lam truc ((va thanh) OR (gia thanh)) vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky ((lang xa) or (dang xay)) hoi. lieu va lam truc ((va thanh) OR (gia thanh)) vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu san ky ((lang xa) or (dang xay)) hoi. lieu va lam truc ((va thanh) OR (gia thanh)) vi cua tre*.