Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thu sach » tu sach, thuat sach, thuoc sach
va thanh » gia thanh, va tinh, le thanh
hieu van » hieu va, thien van, lieu va
van cua » vang cua, ban cua, dan cua
cua tre » cua te, cuu tre, cua triet
sach ly » sach y, sach lo, sach ty
cam duc » cao duc, pham duc, nam duoc
hang xa » hoang xa, hang va, hang ca
ly hang » ly quang

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 ly hang xa hoi. hieu van ((cam duc) or (cam xuc)) ((va thanh) OR (ban thanh)) van cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ly hang xa hoi. hieu van ((cam duc) OR (cam xuc)) ((va thanh) OR (ban thanh)) van cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ly hang xa hoi. hieu van ((cam duc) or (cam xuc)) ((va thanh) OR (ban thanh)) van cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ly hang xa hoi. hieu van ((cam duc) or (cam xuc)) ((va thanh) OR (ban thanh)) van cua tre*.