Perhaps you should try some spelling variations:
bac thuc » bao thuc, bac thua, cach thuc
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
danh du » danh dau, danh tu, dinh du
va danh » va dinh, va dan, va hanh
thuc va » thuc vat, thuc dan, thuc day
van bac » van ban, van bao, van hac
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
so sanh » do sanh
du cua » duy cua, dau cua, dum cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (so sanh)) v ((nang xa) OR (nang ma)) hoi. hieu van bac thuc va danh du cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sanh)) v ((nang xa) OR (nang ma)) hoi. hieu van bac thuc va danh du cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sanh)) v ((nang xa) OR (nang ma)) hoi. hieu van bac thuc va danh du cua tre*".