Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
vu nhan » vu ngan, tu nhan, va nhan
cu nhan » ca nhan
y nang » ky nang, ly nang, v nang
luc va » tuc va, loc va
lai va » loai va, mai va, dai va

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 y nang xa hoi. hieu ((vu nhan) OR (cu nhan)) ((luc va) or (duc va)) hanh lai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu ((vu nhan) OR (cu nhan)) ((luc va) OR (duc va)) hanh lai va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang xa hoi. hieu ((vu nhan) OR (cu nhan)) ((luc va) or (duc va)) hanh lai va triet".
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu ((vu nhan) OR (cu nhan)) ((luc va) or (duc va)) hanh lai va triet*.