Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
tru nang » tra nang, tri nang, truc nano
hanh tai » thanh tai, hang tai, han tai
va triet » va thiet, va trien, ve triet
tu nang » tu nong, tu nano, tu lang
cac tuc » cac toc, cac tu, cac tac
va hanh » van hanh, va thanh, va danh
tuc va » thuc va, truc va, tuc xa
tai va » thai va, mai va, tri va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ((tu nang) or (tru nang)) xa hoi. lieu va cac tuc va hanh tai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ((tu nang) OR (tru nang)) xa hoi. lieu va cac tuc va hanh tai va triet.
• Adding a wildcard symbol may retrieve word variants: thuoc sach ((tu nang) or (tru nang)) xa hoi. lieu va cac tuc va hanh tai va triet*.