Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua nuoc
cam truc » cau truc, nam truc, lam truoc
toc sach » hoc sach, doc sach, thuoc sach
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
cua tuc » cua duc, cua tu, luat tuc
truc va » thuc va, thuc vat, trung va
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
o lang » hoa lang, hoi lang
va cam » va cham, va cac, va cao

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) OR (toc sach)) o lang xa hoi. hieu va cam truc va thanh vi ((cua tuc) or (cua thuoc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) o lang xa hoi. hieu va cam truc va thanh vi ((cua tuc) OR (cua thuoc))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) o lang xa hoi. hieu va cam truc va thanh vi ((cua tuc) or (cua thuoc))*".