Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
hanh di » hanh vi, hanh de, hang di
y nang » ky nang, ly nang, v nang
uoc va » nuoc va, duoc va, quoc va
loc va » hoc va, luc va
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 y nang x hoi. lieu va phat ((uoc va) or (loc va)) hanh di ((cua triet) OR (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y nang x hoi. lieu va phat ((uoc va) OR (loc va)) hanh di ((cua triet) OR (va triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach y nang x hoi. lieu va phat ((uoc va) or (loc va)) hanh di ((cua triet) OR (va triet))".
• Adding a wildcard symbol may retrieve word variants: thuat sach y nang x hoi. lieu va phat ((uoc va) or (loc va)) hanh di ((cua triet) OR (va triet))*.