Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nam thuc » nam thuoc, am thuc, nam thu
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
hanh vai » hanh vi, hanh va, hanh tai
lang xa » lang ha, dang xay, lang van
thi van » thi hanh, thi nang
thi lan » thi hanh, thi nang, thi lien
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
sach o » sach lo, sac o, sach y
o lang » hoa lang, hoi lang

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 o lang xa hoi. ((thi van) or (thi lan)) nam thuc van hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach o lang xa hoi. ((thi van) OR (thi lan)) nam thuc van hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach o lang xa hoi. ((thi van) or (thi lan)) nam thuc van hanh vai cua tre*.