Perhaps you should try some spelling variations:
van quang » tran quang, van tuan, ban quan
thu sach » tu sach, thuat sach, thuoc sach
van quan » van ban
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
vi cua » vai cua, di cua
ve cai » va cai, ve cac, ve tai
va cam » va cham, va cac, va cao
cua te » cua tu

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 ((van quang) OR (van quan)) xa hoi. hieu ((ve cai) or (va cam)) thuc va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((van quang) OR (van quan)) xa hoi. hieu ((ve cai) OR (va cam)) thuc va hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((van quang) OR (van quan)) xa hoi. hieu ((ve cai) or (va cam)) thuc va hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: thu sach ((van quang) OR (van quan)) xa hoi. hieu ((ve cai) or (va cam)) thuc va hanh vi cua te*.