Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
hieu viec » nhieu viec, hieu ve, sieu viet
thanh hai » thanh phan, thanh hoa, thanh san
va triet » va trien, ve triet, cua triet
su sach » so sach, vu sach
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
cac tac » cac bac, cac dac, cac tai
sach ky » sac ky, sach y, sach ty
cac toc » cac toi, cac nuoc, cac thoi
thiet » thieu

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 lang xa hoi. hieu viec ((cac tac) or (cac toc)) van thanh hai ((va triet) OR (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky lang xa hoi. hieu viec ((cac tac) OR (cac toc)) van thanh hai ((va triet) OR (va thiet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky lang xa hoi. hieu viec ((cac tac) or (cac toc)) van thanh hai ((va triet) OR (va thiet))".
• Adding a wildcard symbol may retrieve word variants: su sach ky lang xa hoi. hieu viec ((cac tac) or (cac toc)) van thanh hai ((va triet) OR (va thiet))*.