Perhaps you should try some spelling variations:
bieu hien » dieu hien, dieu khien, bien phien
danh vai » danh sai, danh va, doanh van
vai cua » dai cua, hai cua, lai cua
va danh » va dinh, va dan, va hanh
cac lop » cac hop, cac loai
sach ty » sach y, sach thu, xach tay
xang xa » lang xa, mang xa, ang xa
sach tu » sach thu, cach tu, sach uu
cac lo » cac co, cac bo, cac ho
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: su ((sach ty) OR (sach tu)) xang xa hoi. bieu hien ((cac lo) or (cac lop)) va danh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach tu)) xang xa hoi. bieu hien ((cac lo) OR (cac lop)) va danh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ty) OR (sach tu)) xang xa hoi. bieu hien ((cac lo) or (cac lop)) va danh vai cua te".
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) OR (sach tu)) xang xa hoi. bieu hien ((cac lo) or (cac lop)) va danh vai cua te*.