Perhaps you should try some spelling variations:
thuc van » thuc dan, thuc va, thuc hanh
thanh di » thanh doi, thanh de, thanh do
te sach » toc sach
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang xa
cua tre » cuu tre, cua triet, dua tren
qua am » quan am, qua ap, cua am
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: te sach ty xang xa hoi. hieu qua am ((thuc van) OR (thuc vat)) thanh di ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty xang xa hoi. hieu qua am ((thuc van) OR (thuc vat)) thanh di ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty xang xa hoi. hieu qua am ((thuc van) OR (thuc vat)) thanh di ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: te sach ty xang xa hoi. hieu qua am ((thuc van) OR (thuc vat)) thanh di ((cua tre) or (cua te))*.