Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hieu van » hieu va, thien van, lieu va
tay lang » tai lang, tay tang, tay quang
cuu tre » cua tre, cau tren, cau treo
tinh ve » trinh ve, tinh ven, dinh ve
va tinh » may tinh
su sach » so sach, vu sach
ty lang » ty xang, ty hang, tu lang
nam xuc » cam xuc, nam xua, nam thuc
xuc va » duc va, tuc va, luc va

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 ((ty lang) OR (tay lang)) xa hoi. hieu van nam xuc va tinh ve ((cuu tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty lang) OR (tay lang)) xa hoi. hieu van nam xuc va tinh ve ((cuu tre) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty lang) OR (tay lang)) xa hoi. hieu van nam xuc va tinh ve ((cuu tre) or (su triet))".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty lang) OR (tay lang)) xa hoi. hieu van nam xuc va tinh ve ((cuu tre) or (su triet))*.