Perhaps you should try some spelling variations:
lanh dinh » hanh dinh, thanh dinh, binh dinh
anh dinh » hanh dinh, anh kinh, anh dich
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, tu cach
cu treo » cau treo, cu tren, cau tren
lang xa » lang ha, dang xay, lang van
ty lang » tay lang, ty xang, ty hang
te sach » toc sach
am hoc » ad hoc
van am » van nam, van lam, van dam

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) OR (te sach)) ty lang xa hoi. hieu van am hoc va ((anh dinh) or (lanh dinh)) cu treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ty lang xa hoi. hieu van am hoc va ((anh dinh) OR (lanh dinh)) cu treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ty lang xa hoi. hieu van am hoc va ((anh dinh) or (lanh dinh)) cu treo".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) ty lang xa hoi. hieu van am hoc va ((anh dinh) or (lanh dinh)) cu treo*.