Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cua triet » cua viet, su triet, va triet
hieu cai » hieu cac, hieu ca, hieu bai
hieu chi » hieu cac, hieu moi
hanh vai » hanh vi, hanh va, hanh tai
ty nang » ky nang, ty xang, ty hang
sach ty » sach y, sach tu, sach thu
thue va » thuc va, thuyet va, thuc vat
vai cua » dai cua, hai cua, lai cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ty nang x hoi. ((hieu cai) OR (hieu chi)) nam ((tu va) or (thue va)) hanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ty nang x hoi. ((hieu cai) OR (hieu chi)) nam ((tu va) OR (thue va)) hanh vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ty nang x hoi. ((hieu cai) OR (hieu chi)) nam ((tu va) or (thue va)) hanh vai cua triet".
• Adding a wildcard symbol may retrieve word variants: thuat sach ty nang x hoi. ((hieu cai) OR (hieu chi)) nam ((tu va) or (thue va)) hanh vai cua triet*.