Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh van » thanh san, thanh toan, thanh phan
thu sach » tu sach, thuat sach, thuoc sach
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
van cua » vang cua, ban cua, dan cua
va cham » va chat, va tham
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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 ty nang ((x hoi) or (o hoi)). hieu va cham ((xuc va) OR (luc va)) thanh van cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nang ((x hoi) OR (o hoi)). hieu va cham ((xuc va) OR (luc va)) thanh van cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty nang ((x hoi) or (o hoi)). hieu va cham ((xuc va) OR (luc va)) thanh van cua triet".
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang ((x hoi) or (o hoi)). hieu va cham ((xuc va) OR (luc va)) thanh van cua triet*.