Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
nam thuc » nam thuoc, am thuc, nam thu
nam duoc » nam thuoc, da duoc, dat duoc
tu sach » thu sach, su sach, te sach
sach tu » sach thu, cach tu, sach ty
tu lang » cu lang, tu lanh, xu lang
lang xa » lang ha, dang xay, lang van
lap cuu » lap cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach tu lang xa hoi. lieu va ((nam thuc) or (nam duoc)) van thanh ((lap cuu) OR (cap cuu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu lang xa hoi. lieu va ((nam thuc) OR (nam duoc)) van thanh ((lap cuu) OR (cap cuu)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tu lang xa hoi. lieu va ((nam thuc) or (nam duoc)) van thanh ((lap cuu) OR (cap cuu)) tre".
• Adding a wildcard symbol may retrieve word variants: tu sach tu lang xa hoi. lieu va ((nam thuc) or (nam duoc)) van thanh ((lap cuu) OR (cap cuu)) tre*.