Perhaps you should try some spelling variations:
sach nham » sach nha, sach tham, sach han
nham nang » phap nang, cam nang, kha nang
van hanh » van thanh, ban hanh, van anh
hanh lai » hanh lam, hanh tai, thanh lap
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
va cham » va chat, va tham
tuc van » thuc van, truc van, tuc va

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 nham nang xa hoi. hieu ((va cac) or (va cham)) tuc van hanh lai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach nham nang xa hoi. hieu ((va cac) OR (va cham)) tuc van hanh lai su triet.
• Adding a wildcard symbol may retrieve word variants: tu sach nham nang xa hoi. hieu ((va cac) or (va cham)) tuc van hanh lai su triet*.