Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
thi hanh » thi thanh
van hanh » van thanh, ban hanh, van anh
thuc van » thuc vat, thuc dan, thuc va
nam thuc » nam thuoc, am thuc, nam thu
thi lan » thi nang, thi lien
cua tre » cua te, cuu tre, cua triet
lang ha » long ha
lang xa » dang xay, lang van
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: thu sach y ((lang xa) or (lang ha)) hoi. ((thi hanh) or (thi lan)) nam thuc van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y ((lang xa) OR (lang ha)) hoi. ((thi hanh) OR (thi lan)) nam thuc van hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach y ((lang xa) or (lang ha)) hoi. ((thi hanh) or (thi lan)) nam thuc van hanh vi cua tre*.