Perhaps you should try some spelling variations:
tan hanh » tan thanh, tang hanh, toan hanh
dang xay » dang van, van xay
qua cac » cua cac
lang xa » lang ha, lang van
hanh di » hanh vi, hanh de, hang di
tu san » thu san, tu ban, tu can
qua ca » qua cua, qua cai, quan cau
san ky » sang ky, van ky, dan ky
di cua » dai cua, doi cua, de cua

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. hieu ((qua ca) or (qua cac)) duc tan hanh di cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky ((lang xa) OR (dang xay)) hoi. hieu ((qua ca) OR (qua cac)) duc tan hanh di cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky ((lang xa) OR (dang xay)) hoi. hieu ((qua ca) or (qua cac)) duc tan hanh di cua vat".
• Adding a wildcard symbol may retrieve word variants: tu san ky ((lang xa) OR (dang xay)) hoi. hieu ((qua ca) or (qua cac)) duc tan hanh di cua vat*.