Perhaps you should try some spelling variations:
vu sach » su sach, vu khach
cac tuc » cac toc, cac tu, cac tac
ty hang » ly hang, ty xang, thi hang
hang xa » hoang xa, hang va, hang ca
hieu ve » hieu van
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
hieu va » lieu va, hieu qua
vi cua » vai cua, di cua
cua te » cua tu
tuc va » thuc va, truc va, tuc xa

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) OR (vu bach)) ty hang xa hoi. ((hieu ve) or (hieu va)) cac tuc va danh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu bach)) ty hang xa hoi. ((hieu ve) OR (hieu va)) cac tuc va danh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) OR (vu bach)) ty hang xa hoi. ((hieu ve) or (hieu va)) cac tuc va danh vi cua te".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) OR (vu bach)) ty hang xa hoi. ((hieu ve) or (hieu va)) cac tuc va danh vi cua te*.