Perhaps you should try some spelling variations:
thien van » thi van
ban thanh » ban hanh, ban hang
thanh vi » hanh vi, thanh va, thanh ve
hieu van » hieu va, lieu va, hieu ve
vu sach » vu bach, su sach, vu khach
duc ban » duc tan, duc van, dua ban
cam duc » cam xuc, cao duc, pham duc
ty hang » ly hang, thi hang, thu hang
vi cua » vai cua, di cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ((ty hang) OR (ty xang)) xa hoi. ((hieu van) or (thien van)) cam duc ban thanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((ty hang) OR (ty xang)) xa hoi. ((hieu van) OR (thien van)) cam duc ban thanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ((ty hang) OR (ty xang)) xa hoi. ((hieu van) or (thien van)) cam duc ban thanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: vu sach ((ty hang) OR (ty xang)) xa hoi. ((hieu van) or (thien van)) cam duc ban thanh vi cua te*.