Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
lam duoc » nam duoc, luat duoc, lam thuoc
duoc ban » duc ban, quoc ban, buoc ban
ban hanh » ban hang
hieu van » hieu va, thien van, lieu va
cau tren » cu tren, dau tren, ca tren
van lam » van nam
nang xa » nang x, lang xa, nang ma
sach ky » sac ky, sach y, sach ty
hanh va » hang va, hanh vi
cua tre » cua te, cua triet, dua tren
cuu tre » cau treo

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 ky nang xa hoi. hieu van lam duoc ban hanh va ((cua tre) or (((cuu tre) or (cau tren))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang xa hoi. hieu van lam duoc ban hanh va ((cua tre) OR (((cuu tre) OR (cau tren)))).
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. hieu van lam duoc ban hanh va ((cua tre) or (((cuu tre) or (cau tren))))*.