Perhaps you should try some spelling variations:
tan hanh » tan thanh, tang hanh, toan hanh
lang xa » dang xay, lang van
lang ha » long ha
qua cai » qua hai, qua cac, qua ca
cai duc » cao duc, mai duc, hoai duc
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
di cua » doi cua, de cua, do 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 (lang ha)) hoi. hieu qua cai duc tan hanh ((di cua) or (dai cua)) vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky ((lang xa) OR (lang ha)) hoi. hieu qua cai duc tan hanh ((di cua) OR (dai cua)) vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky ((lang xa) OR (lang ha)) hoi. hieu qua cai duc tan hanh ((di cua) or (dai cua)) vat".
• Adding a wildcard symbol may retrieve word variants: tu san ky ((lang xa) OR (lang ha)) hoi. hieu qua cai duc tan hanh ((di cua) or (dai cua)) vat*.