Perhaps you should try some spelling variations:
chu treo » cau treo, cu tren, cau tren
nang mai » nang ma, nang tai, lang mai
danh hai » dang hai, lanh hai, manh hai
hieu van » hieu va, thien van, lieu va
sach thu » sach thue, sach thieu, sach tham
mai hoi » mai khoi, dai hoi, lai hoi
sach ty » sach y, sach tu, xach tay
cam tuc » cam xuc, nam thuc, dam thuc
va danh » va dinh, va dan, va hanh
hai chu » hai chau, hoi chu, hai chi
cam tu » cam thu, nam tu, dam tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ty) or (sach thu)) nang mai hoi. hieu van ((cam tuc) OR (cam tu)) va danh hai chu treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach thu)) nang mai hoi. hieu van ((cam tuc) OR (cam tu)) va danh hai chu treo*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ty) or (sach thu)) nang mai hoi. hieu van ((cam tuc) OR (cam tu)) va danh hai chu treo*".