Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
toc sach » hoc sach, doc sach, thuoc sach
nam thuc » nam thuoc, am thuc, nam thu
danh di » danh du, xanh di, danh dien
hanh ve » hanh vi, hanh va, hanh kem
hanh de » hanh kem
sach ty » sach y, sach tu, sach thu
thuc va » thuc vat, thuc dan, thuc day
lang xa » lang ha, dang xay, lang van
ty lang » tay lang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ty lang xa hoi. hieu quang nam thuc va ((danh di) or (((hanh de) OR (hanh ve)))) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty lang xa hoi. hieu quang nam thuc va ((danh di) OR (((hanh de) OR (hanh ve)))) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty lang xa hoi. hieu quang nam thuc va ((danh di) or (((hanh de) OR (hanh ve)))) cua tre".
• Adding a wildcard symbol may retrieve word variants: toc sach ty lang xa hoi. hieu quang nam thuc va ((danh di) or (((hanh de) OR (hanh ve)))) cua tre*.