Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
su triet » su viet, su tien, ve triet
ly nang » ky nang, ly hang, ly vang
va tham » van tham, va cham, va thanh
hanh di » hanh vi, hanh de, hang di
y nang » ky nang, v nang, may nang
luc va » duc va, tuc va, loc va
x hoi » xa hoi, o hoi, x ho
di su » doi su, ki su, da su

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((y nang) or (ly nang)) x hoi. lieu va tham ((hoc va) or (luc va)) hanh di su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((y nang) OR (ly nang)) x hoi. lieu va tham ((hoc va) OR (luc va)) hanh di su triet.
• Adding a wildcard symbol may retrieve word variants: thu sach ((y nang) or (ly nang)) x hoi. lieu va tham ((hoc va) or (luc va)) hanh di su triet*.