Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
ky lang » ky dang, ky tang, tay lang
va cham » va chat, va tham
truc va » thuc va, thuc vat, trung va
tai cua » thai cua, tai cuc, tri cua
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ((ky lang) OR (ky nang)) xa hoi. lieu va cham ((luc va) or (truc va)) thanh tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((ky lang) OR (ky nang)) xa hoi. lieu va cham ((luc va) OR (truc va)) thanh tai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((ky lang) OR (ky nang)) xa hoi. lieu va cham ((luc va) or (truc va)) thanh tai cua triet".
• Adding a wildcard symbol may retrieve word variants: toc sach ((ky lang) OR (ky nang)) xa hoi. lieu va cham ((luc va) or (truc va)) thanh tai cua triet*.