Perhaps you should try some spelling variations:
sach tay » xach tay, sach hay, sach nay
tay lang » tai lang, tay tang, tay quang
lang van » dang van, tang van, hoang van
vu sach » vu bach, su sach, vu khach
van hoi » van hoa, van hoc, van hoe
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
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: vu sach tay lang van hoi. hieu ve cam ((duc va) or (thuc vat)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach tay lang van hoi. hieu ve cam ((duc va) OR (thuc vat)) hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: vu sach tay lang van hoi. hieu ve cam ((duc va) or (thuc vat)) hanh vi cua tre*.