Perhaps you should try some spelling variations:
dieu cua » dieu tra
hoc sach » hoc sinh, hoc cac, hoc anh
te sach » toc sach
va hang » van hang, va nang, va lang
va cham » va chat, va tham
hieu va » lieu va, hieu qua
hang xa » hoang xa, hang va, hang ca
ly hang » ly quang
soc va » hoc va, loc va, doc va
di cua » dai cua, doi cua, de cua

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 (hoc sach)) ly hang xa hoi. hieu va cham soc va hang ((di cua) or (dieu cua)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (hoc sach)) ly hang xa hoi. hieu va cham soc va hang ((di cua) OR (dieu cua)) tu.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (hoc sach)) ly hang xa hoi. hieu va cham soc va hang ((di cua) or (dieu cua)) tu*.