Perhaps you should try some spelling variations:
than tai » thanh tai, toan tai, nhan tai
toc sac » toc sach, hoc sach, doc sach
han tai » hang tai, nhan tai, van tai
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
cua te » cua tu
va am » va lam, va cam

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 va am 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 va am 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 va am 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 va am thuc va ((han tai) or (than tai)) cua te*.