Perhaps you should try some spelling variations:
thuoc vat » thuc vat, thuoc va, thuoc bat
nam thuoc » nam thuc, nam thu, nha thuoc
vat danh » va danh, van danh, luat danh
hieu van » hieu va, thien van, lieu va
sach thu » sach thue, sach thieu, sach tham
lang xa » lang ha, dang xay, lang van
sach ty » sach y, sach tu, xach tay
va chua » vua chua, ca chua, va chu
va cua » via cua, ca cua, ma cua

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) or (sach thu)) lang xa hoi. hieu van nam thuoc vat danh ((va cua) OR (va chua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach ty) OR (sach thu)) lang xa hoi. hieu van nam thuoc vat danh ((va cua) OR (va chua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((sach ty) or (sach thu)) lang xa hoi. hieu van nam thuoc vat danh ((va cua) OR (va chua)) te".
• Adding a wildcard symbol may retrieve word variants: toc ((sach ty) or (sach thu)) lang xa hoi. hieu van nam thuoc vat danh ((va cua) OR (va chua)) te*.