Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cua triet » cua viet, su triet, va triet
hanh tai » thanh tai, hang tai, han tai
hieu van » hieu va, thien van, lieu va
cac dac » cac dan, cac dai, cac tac
tai cua » thai cua, tai cuc, tri cua
va hanh » van hanh, va thanh, va danh
cac bac » cac bai, cac ban, cac cach
tu sach » thu sach, su sach, te sach
ty nang » ky nang, ty xang, ty hang
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: ((tu sach) or (thuat sach)) ty nang x hoi. hieu van ((cac dac) or (cac bac)) va hanh tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat sach)) ty nang x hoi. hieu van ((cac dac) OR (cac bac)) va hanh tai cua triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuat sach)) ty nang x hoi. hieu van ((cac dac) or (cac bac)) va hanh tai cua triet*.