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