Perhaps you should try some spelling variations:
hoc giao » hoc cao
thanh vi » hanh vi, thanh va, thanh ve
danh xay » dang xay, manh xay, anh xay
toc giay » toc tay, tac gia, hoc giai
xay hoi » xa hoi, tay hoi, cay phoi
hieu ve » hieu va, hieu van
sach ky » sac ky, sach ty, sach kem
vi cua » vai cua, di cua
ve cam » ve cham, ve cac, va cam
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) or (sach y)) danh xay hoi. hieu ve cam ((toc giay) OR (hoc giao)) thanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach ky) OR (sach y)) danh xay hoi. hieu ve cam ((toc giay) OR (hoc giao)) thanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((sach ky) or (sach y)) danh xay hoi. hieu ve cam ((toc giay) OR (hoc giao)) thanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: vu ((sach ky) or (sach y)) danh xay hoi. hieu ve cam ((toc giay) OR (hoc giao)) thanh vi cua te*.