Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
thanh ve » hanh ve, thanh va, thanh vien
bach ty » sach ty, xach tay, bach thu
ty hang » ly hang, ty xang, thi hang
cua tuc » cua duc, cua tu, cua thuoc
ca hoi » cua hoi, xa hoi, co hoi
ve cua » le cua, de cua, te cua

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

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