Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cac thuc » cach thuc, cac thu, can thuc
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
y lang » o lang, _ lang, tay lang
di cuu » di cau, dinh cuu
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach y lang xa hoi. hieu va cac thuc va danh ((di cuu) OR (di cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach y lang xa hoi. hieu va cac thuc va danh ((di cuu) OR (di cua)) tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach y lang xa hoi. hieu va cac thuc va danh ((di cuu) OR (di cua)) tre*.