Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
cham dua » chay dua, cham giua, pham duc
dua ban » dia ban, cua ban, qua ban
ve cham » va cham, ve chat, vu cham
sach ky » sac ky, sach ty, sach kem
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((sach ky) OR (sach y)) nang ma hoa. hieu ve cham dua ban ((thanh lai) or (thanh san)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach ky) OR (sach y)) nang ma hoa. hieu ve cham dua ban ((thanh lai) OR (thanh san)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((sach ky) OR (sach y)) nang ma hoa. hieu ve cham dua ban ((thanh lai) or (thanh san)) cua tre".
• Adding a wildcard symbol may retrieve word variants: toc ((sach ky) OR (sach y)) nang ma hoa. hieu ve cham dua ban ((thanh lai) or (thanh san)) cua tre*.