Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thanh vai » thanh hai, thanh van, thanh tai
va triet » va thiet, va trien, ve triet
hieu ve » hieu va, hieu van
dua ban » dia ban, qua ban, mua ban
y nang » ky nang, ly nang, v nang
ve bao » te bao, va bao
cua tu » cua tuc, cua su, cua cu
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. hieu ve bao ((dua ban) OR (cua ban)) thanh vai ((va triet) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y nang x hoi. hieu ve bao ((dua ban) OR (cua ban)) thanh vai ((va triet) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach y nang x hoi. hieu ve bao ((dua ban) OR (cua ban)) thanh vai ((va triet) or (cua tu))".
• Adding a wildcard symbol may retrieve word variants: thuat sach y nang x hoi. hieu ve bao ((dua ban) OR (cua ban)) thanh vai ((va triet) or (cua tu))*.