Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
toc sach » doc sach, thuoc sach, nuoc sach
phan lap » phan dau
cham dua » chay dua, cham giua, pham duc
hoc sach » hoc sinh, hoc cac, hoc anh
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
dua ban » dia ban, cua ban, qua ban
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) OR (hoc sach)) ky nang ma hoa. hieu ve cham dua ban ((thanh lai) or (phan lap)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) ky nang ma hoa. hieu ve cham dua ban ((thanh lai) OR (phan lap)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (hoc sach)) ky nang ma hoa. hieu ve cham dua ban ((thanh lai) or (phan lap)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) OR (hoc sach)) ky nang ma hoa. hieu ve cham dua ban ((thanh lai) or (phan lap)) cua tre*.