Perhaps you should try some spelling variations:
sach tru » sach truc, sach thu, sach tu
hieu van » hieu va, thien van, lieu va
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
van cam » van nam, van lam, van cau
cam cuc » cam xuc, cham cuu, pham cuc
cuc ban » cua ban, cac ban, cuu ban
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 tru ((nang xa) OR (nang ma)) hoi. hieu van cam cuc ban hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tru ((nang xa) OR (nang ma)) hoi. hieu van cam cuc ban hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach tru ((nang xa) OR (nang ma)) hoi. hieu van cam cuc ban hanh vi cua tre*.