Perhaps you should try some spelling variations:
thanh mat » thanh dat, thanh mau, thanh mot
van thanh » ban thanh, van tuan
cham duc » pham duc, cham soc, pham duy
mat cua » ma cua, manh cua, mang cua
duc van » duc va, duc tan, duc manh
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
cua tre » cua te, cuu tre, cua triet
sach ly » sach y, sach ty, sach hay
sach lo » sach dao, sach doi, sach hoi
ma hoi » mai hoi, xa hoi, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ly) OR (sach lo)) nang ((ma hoi) or (ma hoa)). hieu vu cham duc van thanh mat cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ly) OR (sach lo)) nang ((ma hoi) OR (ma hoa)). hieu vu cham duc van thanh mat cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ly) OR (sach lo)) nang ((ma hoi) or (ma hoa)). hieu vu cham duc van thanh mat cua tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach ly) OR (sach lo)) nang ((ma hoi) or (ma hoa)). hieu vu cham duc van thanh mat cua tre*.