Perhaps you should try some spelling variations:
bach nuoc » bach tuoc, sach nuoc, bich ngoc
van hanh » van thanh, ban hanh, van anh
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve bach » ve cach, vu bach, vi bach
va hanh » va thanh, va danh, ban hanh
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty nang xa hoi. hieu ve bach nuoc ((va hanh) or (van hanh)) du ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty nang xa hoi. hieu ve bach nuoc ((va hanh) OR (van hanh)) du ((cua te) OR (cua tu)).
• Adding a wildcard symbol may retrieve word variants: so sach ty nang xa hoi. hieu ve bach nuoc ((va hanh) or (van hanh)) du ((cua te) or (cua tu))*.