Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cua triet » cua viet, su triet, va triet
hanh vai » hanh vi, hanh va, hanh tai
ty nang » ty xang, ty hang, ly nang
hieu ca » hieu cac, hieu cua, hieu va
thue va » thuc va, thuyet va, thuc vat
vai cua » dai cua, hai cua, lai cua
ca nam » cua nam, cai nam, ha nam
thu va » thuc va, tu va, thu ha
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) OR (ky nang)) x hoi. hieu ca nam ((thu 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) OR (ky nang)) x hoi. hieu ca nam ((thu 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) OR (ky nang)) x hoi. hieu ca nam ((thu va) or (thue va)) hanh vai cua triet".
• Adding a wildcard symbol may retrieve word variants: thuat sach ((ty nang) OR (ky nang)) x hoi. hieu ca nam ((thu va) or (thue va)) hanh vai cua triet*.