Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
lang van » dang van, tang van, hoang van
truc van » truc va, thuc van, truc ban
ve cham » va cham, ve chat, vu cham
tuc van » thuc van, tuc va, duc van
cua tre » cua te, cuu tre, cua triet
van hoi » van hoa, van hoc, van hoe
y lang » o lang, _ lang, tay lang
ve cam » ve cac, va cam, ve cai
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: toc sach y lang van hoi. hieu ((ve cam) or (ve cham)) ((tuc van) OR (truc van)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y lang van hoi. hieu ((ve cam) OR (ve cham)) ((tuc van) OR (truc van)) hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y lang van hoi. hieu ((ve cam) or (ve cham)) ((tuc van) OR (truc van)) hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: toc sach y lang van hoi. hieu ((ve cam) or (ve cham)) ((tuc van) OR (truc van)) hanh vi cua tre*.