Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
danh xay » manh xay, anh xay, dan xay
dang xay » dang van, van xay
vu sach » vu bach, su sach, vu khach
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
loc va » luc va
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 ty ((danh xay) or (dang xay)) hoi. hieu ve cam ((loc va) OR (hoc va)) thanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty ((danh xay) OR (dang xay)) hoi. hieu ve cam ((loc va) OR (hoc va)) thanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ty ((danh xay) or (dang xay)) hoi. hieu ve cam ((loc va) OR (hoc va)) thanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: vu sach ty ((danh xay) or (dang xay)) hoi. hieu ve cam ((loc va) OR (hoc va)) thanh vi cua te*.