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
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty hang » ly hang, ty xang, thi hang
hang xa » hoang xa, hang va, hang ca
hieu ve » hieu va, hieu van
cu tren » tu tren, dua tren
ve cam » ve cham, ve cac, va cam

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: tu sach ty hang xa hoi. hieu ve cam thuc ban thanh lai ((cu tren) OR (cau tao))~.
• Adding a wildcard symbol may retrieve word variants: tu sach ty hang xa hoi. hieu ve cam thuc ban thanh lai ((cu tren) or (cau tao))*.