Perhaps you should try some spelling variations:
dang mau » dong mau, dang van, dang su
ky dang » ky nang, ky danh
mau hoi » cau hoi, mai hoi, mau ho
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
hai cuc » hai cua, thai cua, hai huoc
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
luc va » tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky dang mau hoi. hieu vu cham ((luc va) or (duc va)) thanh ((hai cuc) OR (tai cuc)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky dang mau hoi. hieu vu cham ((luc va) OR (duc va)) thanh ((hai cuc) OR (tai cuc)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky dang mau hoi. hieu vu cham ((luc va) or (duc va)) thanh ((hai cuc) OR (tai cuc)) tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky dang mau hoi. hieu vu cham ((luc va) or (duc va)) thanh ((hai cuc) OR (tai cuc)) tre*.