Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
van cau » van dau, van hau, van chat
nang xa » nang x, lang xa, nang ma
tuc va » thuc va, truc va, tuc xa
va cau » va cac, va dau, va cao
di cau » da cau, diem cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang xa hoi. hieu van cau ((duc va) or (tuc va)) hanh ((va cau) or (di cau)) treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu van cau ((duc va) OR (tuc va)) hanh ((va cau) OR (di cau)) treo.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu van cau ((duc va) or (tuc va)) hanh ((va cau) or (di cau)) treo*.