Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hang tai » hang va, dung tai
hanh tai » thanh tai, han tai, hinh tai
sach ky » sac ky, sach y, sach ty
te sach » toc sach
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
cac lop » cac hop, cac loai
cac lo » cac co, cac bo, cac ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang xa hoi. hieu ve ((cac lo) OR (cac lop)) van ((hanh tai) or (hang tai)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. hieu ve ((cac lo) OR (cac lop)) van ((hanh tai) OR (hang tai)) cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang xa hoi. hieu ve ((cac lo) OR (cac lop)) van ((hanh tai) or (hang tai)) cua viet".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. hieu ve ((cac lo) OR (cac lop)) van ((hanh tai) or (hang tai)) cua viet*.