Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh lai » thanh hai, thanh lap, thanh loi
cau tren » cu tren, dau tren, ca tren
sach tru » sach truc, sach thu, sach tu
tru tang » tri tang, tru nang, tru tan
cuu tre » cau treo
cua tre » cua te, cua triet, dua tren
su sach » so sach, vu sach
cam thu » nam thu, cac thu, ca thu
hieu ve » hieu va, hieu van
tang ma » mang may, tang van
thu ban » thu hang
ve cam » ve cham, ve cac, va cam
ma hoi » mai hoi, xa hoi, ma hoa

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 tru tang ma hoi. hieu ve cam thu ban thanh lai ((cua tre) or (((cuu tre) OR (cau tren))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tru tang ma hoi. hieu ve cam thu ban thanh lai ((cua tre) OR (((cuu tre) OR (cau tren)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach tru tang ma hoi. hieu ve cam thu ban thanh lai ((cua tre) or (((cuu tre) OR (cau tren))))".
• Adding a wildcard symbol may retrieve word variants: su sach tru tang ma hoi. hieu ve cam thu ban thanh lai ((cua tre) or (((cuu tre) OR (cau tren))))*.