Perhaps you should try some spelling variations:
manh hai » lanh hai, minh hai, thanh hai
hai cua » thai cua, dai cua, hoi cua
xa manh » ha manh, van manh, day manh
hieu le » hieu ve, hieu ly, tieu le
sach ky » sach y, sach ty, sach kem
hieu he » hieu ve, hiem he, hieu hien
tang ma » mang may, tang van
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
thu xa » thu xac, thu ha, thu xe
sac ky » cac ky, sai ky

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 ky) or (sac ky)) tang ma hoi. ((hieu he) OR (hieu le)) nam thu xa manh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sac ky)) tang ma hoi. ((hieu he) OR (hieu le)) nam thu xa manh hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) or (sac ky)) tang ma hoi. ((hieu he) OR (hieu le)) nam thu xa manh hai cua tre".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (sac ky)) tang ma hoi. ((hieu he) OR (hieu le)) nam thu xa manh hai cua tre*.