Perhaps you should try some spelling variations:
danh vai » danh sai, danh va, doanh van
thi hang » thi hanh, thi nang, thi hong
su sach » so sach, vu sach
vai cuu » vai cua
va danh » va dinh, va dan, va hanh
hieu va » lieu va, hieu qua
cuu tre » cua tre, cau tren, cau treo
hieu ve » hieu van
ty hang » ly hang, ty xang, thu hang
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 hang) or (thi hang)) xa hoi. ((hieu ve) OR (hieu va)) cam xuc va danh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty hang) OR (thi hang)) xa hoi. ((hieu ve) OR (hieu va)) cam xuc va danh vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty hang) or (thi hang)) xa hoi. ((hieu ve) OR (hieu va)) cam xuc va danh vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty hang) or (thi hang)) xa hoi. ((hieu ve) OR (hieu va)) cam xuc va danh vai cuu tre*.