Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
hieu hien » bieu hien, dieu hien, chieu chien
danh vai » danh sai, danh va, dang van
su sach » so sach, vu sach
cac lop » cac hop, cac loai
nang xa » nang x, lang xa, nang ma
sach ky » sac ky, sach y, sach ty
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 ky nang xa hoi. hieu hien ((cac lo) or (cac lop)) va ((danh vai) OR (doanh van)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu hien ((cac lo) OR (cac lop)) va ((danh vai) OR (doanh van)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu hien ((cac lo) or (cac lop)) va ((danh vai) OR (doanh van)) cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu hien ((cac lo) or (cac lop)) va ((danh vai) OR (doanh van)) cua te*.