Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
thanh vi » hanh vi, thanh va, thanh ve
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
ky hang » ky nang, ly hang, ky dang
hieu ve » hieu va, hieu van
cac loc » cac toc, cac hoc, cac nuoc
cac lop » cac hop, cac loai
va hoi » xa hoi, va hoc, va hoa
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 ky hang va hoi. hieu ve ((cac loc) OR (cac lop)) va thanh vi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky hang va hoi. hieu ve ((cac loc) OR (cac lop)) va thanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: vu sach ky hang va hoi. hieu ve ((cac loc) OR (cac lop)) va thanh vi cua te*.