Perhaps you should try some spelling variations:
dung tren » dung trong, dung trung
ban danh » ban doanh, ban hanh, ban dan
hieu van » hieu va, thien van, lieu va
cuu tre » cua tre, cau tren, cau treo
xua ban » xuat ban, cua ban, qua ban
danh ve » dinh ve, hanh ve, anh ve
nam xua » nam cua, nam mua, nam qua
lang xa » lang ha, dang xay, lang van
sac ky » sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sac ky) OR (cac ky)) lang xa hoi. hieu van nam xua ban danh ve ((dung tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (cac ky)) lang xa hoi. hieu van nam xua ban danh ve ((dung tren) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sac ky) OR (cac ky)) lang xa hoi. hieu van nam xua ban danh ve ((dung tren) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) OR (cac ky)) lang xa hoi. hieu van nam xua ban danh ve ((dung tren) or (cuu tre))*.