Perhaps you should try some spelling variations:
xa thanh » va thanh, ha thanh, gia thanh
hieu van » hieu va, thien van, lieu va
nam truc » nam truoc, nam thuc, nam trung
ta thanh » tai thanh, va thanh, ha thanh
su sach » so sach, vu sach
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
xa hanh » xa khanh, va hanh, da hanh
y nang » ky nang, ly nang, v nang
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: su sach y nang x hoi. hieu van nam truc ((xa hanh) or (((xa thanh) OR (ta thanh)))) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang x hoi. hieu van nam truc ((xa hanh) OR (((xa thanh) OR (ta thanh)))) vai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang x hoi. hieu van nam truc ((xa hanh) or (((xa thanh) OR (ta thanh)))) vai cua tre*".