Perhaps you should try some spelling variations:
"tu mach co hoc" » "tu cach co hoc", "tu manh co hoc", "tu hach co hoc", "tu mach cao hoc", "tu mach so hoc", "tu mach o hoc"
"te cho moi hoa" » "te khoe moi hoa", "te cho mon hoa", "te cho boi hoa", "te cho doi hoa", "te cao moi hoa", "te co moi hoa", "de cho moi hoa", "te choc moi hoa", "te choa moi hoa", "te ctho moi hoa"
"te ho moi hoa" » "te ho mon hoa", "te ho boi hoa", "te ho doi hoa", "te hoc moi hoa", "te hoa moi hoa", "te tho moi hoa"
"te sach ba hoa" » "toc sach ba hoa", "te sach bai hoa", "te sach bac hoa", "te sach bao hoa", "te sach ma hoa", "te sach va hoa"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"tu mach co hoc\") OR (((((\"te cho moi hoa\") OR (\"te ho moi hoa\"))) OR (\"te sach ba hoa\"))))~".
• Removing quotes may allow a broader search: (( tu mach co hoc ) OR ((((( te cho moi hoa ) OR ( te ho moi hoa ))) OR ( te sach ba hoa ))))~.
• Adding a wildcard symbol may retrieve word variants: (("tu mach co hoc") OR ((((("te cho moi hoa") OR ("te ho moi hoa"))) OR ("te sach ba hoa"))))*.