Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thanh dam » thanh dat, thanh nam, thanh tam
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
dam cua » dai cua, day cua, nam cua
lam tuc » lam thuoc, lam truoc, luat tuc
van lam » van nam
tu sach » thu sach, su sach, te sach
ty lang » tay lang, ty hang, tu lang
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, tuc xa

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 (thuoc sach)) ((ty lang) OR (ty xang)) xa hoi. hieu van lam tuc va thanh dam cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuoc sach)) ((ty lang) OR (ty xang)) xa hoi. hieu van lam tuc va thanh dam cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thuoc sach)) ((ty lang) OR (ty xang)) xa hoi. hieu van lam tuc va thanh dam cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuoc sach)) ((ty lang) OR (ty xang)) xa hoi. hieu van lam tuc va thanh dam cua tre*.