Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
van thanh » ban thanh, van tuan
chat huu » pham huu
van hanh » ban hanh, van anh, van ban
chat xuc » cam xuc, chao xu, chat cua
cua tre » cua te, cuu tre, cua triet
hieu tu » chieu tu, hieu tuc, hien tu
lang xa » lang ha, dang xay, lang van
y lang » o lang, _ lang, tay lang
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: thuoc sach y lang xa hoi. hieu tu ((chat xuc) OR (chat huu)) ((van hanh) or (van thanh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach y lang xa hoi. hieu tu ((chat xuc) OR (chat huu)) ((van hanh) OR (van thanh)) vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach y lang xa hoi. hieu tu ((chat xuc) OR (chat huu)) ((van hanh) or (van thanh)) vi cua tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach y lang xa hoi. hieu tu ((chat xuc) OR (chat huu)) ((van hanh) or (van thanh)) vi cua tre*.