Perhaps you should try some spelling variations:
danh vai » danh sai, danh va, doanh van
hieu van » hieu va, thien van, lieu va
sach thi » sach tai, sach thieu, sach tham
dau tren » dau tien, dat tren, dau tieng
sach thu » sach thue, sach thieu, sach tham
hang xa » hoang xa, hang va, hang ca
hieu ve » hieu va
cam duc » cam xuc, cao duc, pham duc
va danh » va dinh, va dan, va hanh
vai dau » va dau, van dau, xvii dau

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach thi) OR (sach thu)) hang xa hoi. ((hieu ve) OR (hieu van)) cam duc va danh vai dau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((sach thi) OR (sach thu)) hang xa hoi. ((hieu ve) or (hieu van)) cam duc va danh vai dau tren~".
• Adding a wildcard symbol may retrieve word variants: toc ((sach thi) OR (sach thu)) hang xa hoi. ((hieu ve) or (hieu van)) cam duc va danh vai dau tren*.