Perhaps you should try some spelling variations:
vat thanh » dat thanh, gat thanh, tat thanh
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam tu
thanh do » thanh de, thanh pho, thanh hoa
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang
do cua » doi cua, co cua, de cua

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 xa hoi. hieu van ((nam thuc) or (nam thu)) vat thanh do cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang xa hoi. hieu van ((nam thuc) OR (nam thu)) vat thanh do cua triet.
• Adding a wildcard symbol may retrieve word variants: thu sach y nang xa hoi. hieu van ((nam thuc) or (nam thu)) vat thanh do cua triet*.