Perhaps you should try some spelling variations:
thanh vang » thanh van, thanh hang, thanh hoang
hieu van » hieu va, thien van, lieu va
vang cua » mang cua, hang cua, tang cua
su sach » vu sach
cao suc » cao su
cao duc » dao duc, giao duc, tao duoc
lang xa » lang ha, dang xay, lang van
ty lang » tay lang, ty xang, ty hang
so sach » so sanh, bo sach, co sach
cua te » cua tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ty lang xa hoi. hieu van ((cao duc) OR (cao suc)) gia thanh vang cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) ty lang xa hoi. hieu van ((cao duc) or (cao suc)) gia thanh vang cua te~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (so sach)) ty lang xa hoi. hieu van ((cao duc) or (cao suc)) gia thanh vang cua te*.