Perhaps you should try some spelling variations:
tvan tai » toan tai, tan tai, tuan tai
lang van » dang van, tang van, hoang van
nam thuc » nam thuoc, am thuc, nam thu
toc sac » toc sach, toc san, hoc sach
van tai » von tai, van tuan
thuc va » thuc vat, thuc dan, thuc day
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay
sac ky » cac ky, sai ky
va nam » van nam, ha nam, va nay
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: toc sac ky ((lang xa) OR (lang van)) hoi. hieu va nam thuc va ((van tai) or (tvan tai)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sac ky ((lang xa) OR (lang van)) hoi. hieu va nam thuc va ((van tai) OR (tvan tai)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sac ky ((lang xa) OR (lang van)) hoi. hieu va nam thuc va ((van tai) or (tvan tai)) cua te".
• Adding a wildcard symbol may retrieve word variants: toc sac ky ((lang xa) OR (lang van)) hoi. hieu va nam thuc va ((van tai) or (tvan tai)) cua te*.