Perhaps you should try some spelling variations:
chat duc » chat xuc, chat doc, chet duoc
hanh lam » thanh lap, hanh va, dinh lam
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang

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