Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
ban thanh » ban hanh, ban hang
cam thuc » am thuc, nam thuc, cam thu
thuc ban » thuoc ban, thuc dan, thu ban
tru tang » tri tang, tru nang, tru tan
sach tru » sach truc, sach thu, sach tu
cua tre » cua te, cua triet, dua tren
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
tang ma » mang may, tang van
cuu tre » cau tren, cau treo
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 thuc ban thanh lai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tru tang ma hoi. hieu ve cam thuc ban thanh lai ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: su sach tru tang ma hoi. hieu ve cam thuc ban thanh lai ((cua tre) or (cuu tre))*.