Perhaps you should try some spelling variations:
tu quang » vu quang, chu quang, bui quang
thuc van » thuc vat, thuc dan, thuc va
tu sach » thu sach, su sach, te sach
ve cham » va cham, ve chat, vu cham
luc van » luoc van, luu van, duc van
hieu ve » hieu va, hieu van
xu lang » cu lang, tu lang, xu dang
cua tre » cua te, cuu tre, cua triet
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: tu sach ((tu quang) or (xu lang)) xa hoi. hieu ve cham ((thuc van) or (luc van)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((tu quang) OR (xu lang)) xa hoi. hieu ve cham ((thuc van) OR (luc van)) hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ((tu quang) or (xu lang)) xa hoi. hieu ve cham ((thuc van) or (luc van)) hanh vi cua tre*.