Perhaps you should try some spelling variations:
bat thanh » ban thanh, bac thanh, dat thanh
thanh vi » hanh vi, thanh va, thanh ve
truc bat » truc ban, truc bach, thuoc bat
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
van cau » van dau, van hau, van chat
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
vu sach » vu bach, su sach, vu khach
tu cach » tu cac
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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) or (tu cach))) or (vu sach)) ky lang xa hoi. hieu van cau truc bat thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sach) OR (tu cach))) OR (vu sach)) ky lang xa hoi. hieu van cau truc bat thanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((((tu sach) or (tu cach))) or (vu sach)) ky lang xa hoi. hieu van cau truc bat thanh vi cua tre*.