Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
thuc day » thuc dan, thuc vat
phan lap » phan dau
thanh do » thanh de, thanh pho, thanh hoa
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet
y lang » o lang, _ lang, tay lang

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 van nam thuc day ((phan lap) or (thanh do)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach y lang xa hoi. hieu van nam thuc day ((phan lap) OR (thanh do)) cua tre.
• Adding a wildcard symbol may retrieve word variants: thuoc sach y lang xa hoi. hieu van nam thuc day ((phan lap) or (thanh do)) cua tre*.