Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
toc sach » hoc sach, doc sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
tu lang » cu lang, tu lanh, xu lang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
do thuc » hoc thuc, dan thuc
thuc va » thuc vat, thuc dan, thuc day
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
va do » va dao, va doc, va co

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (toc sach)) tu lang xa hoi. hieu va do thuc va thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) tu lang xa hoi. hieu va do thuc va thanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) tu lang xa hoi. hieu va do thuc va thanh vai cua tre*.