Perhaps you should try some spelling variations:
vat danh » va danh, van danh, luat danh
nam thuc » nam thuoc, am thuc, nam thu
dang xay » dang van, van xay
sach thu » sach thue, sach thieu, sach tham
chua tre » chua tri, cua tre, chua trieu
lang xa » lang ha, lang van
sach ty » sach y, sach tu, xach tay
danh va » doanh va, hanh va, anh va
va chua » vua chua, ca chua, va chu
va nam » van nam, ha nam, va nay

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