Perhaps you should try some spelling variations:
nam truc » nam truoc, nam thuc, nam trung
hieu van » hieu va, thien van, lieu va
danh di » danh du, xanh di, danh dien
danh vi » hanh vi, dinh vi, danh va
truc va » thuc va, thuc vat, trung va
su sach » so sach
lang xa » lang ha, dang xay, lang van
ly lang » ly hang, ly vang, le lang
vu sach » vu bach, vu khach
cuu tre » cua tre, cau tren, cau treo

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 (vu sach)) ly lang xa hoi. hieu van nam truc va ((danh vi) OR (danh di)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ly lang xa hoi. hieu van nam truc va ((danh vi) OR (danh di)) cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) ly lang xa hoi. hieu van nam truc va ((danh vi) OR (danh di)) cuu tre*".