Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
ban thanh » ban hanh, ban hang
sach tru » sach truc, sach tu, sach tren
sach thu » sach thue, sach thieu, sach tham
cua tre » cua te, cua triet, dua tren
tuc ban » thuc ban, truc ban, tu ban
cuu tre » cau tren, cau treo
cam tuc » cam xuc, cam tu, nam thuc
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cham, ve cac, va cam

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