Perhaps you should try some spelling variations:
thanh loi » thanh hoa, thanh hai, thanh lap
dan thanh » dang thanh, danh thanh, ban thanh
cua triet » cua viet, su triet, va triet
dung dan » dung dat, dung san, tung dan
tac dung » sach dung, xay dung, tin dung
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
y nang » ky nang, ly nang, v nang
va tac » va cac
cua te » cua tu
x hoi » xa hoi, o hoi, 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: tu sach y nang ((x hoi) OR (x ho)). hieu va tac dung dan thanh loi ((cua triet) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ((x hoi) OR (x ho)). hieu va tac dung dan thanh loi ((cua triet) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ((x hoi) OR (x ho)). hieu va tac dung dan thanh loi ((cua triet) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ((x hoi) OR (x ho)). hieu va tac dung dan thanh loi ((cua triet) or (cua te))*.