Perhaps you should try some spelling variations:
dang maum » dang mam, dang nam, dong mau
hanh tai » thanh tai, hang tai, han tai
dang mau » dong mau, dang van, dang su
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
ve cham » va cham, ve chat, vu cham
xuc van » duc van, luc van, vuc van
sach ky » sac ky, sach y, sach ty
cuc tre » duc tre, cua tre, cuu tre
ve cai » va cai, ve cac, ve tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky ((dang mau) or (dang maum)) hoi. hieu ((ve cai) or (ve cham)) xuc van hanh tai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((dang mau) OR (dang maum)) hoi. hieu ((ve cai) OR (ve cham)) xuc van hanh tai cuc tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((dang mau) or (dang maum)) hoi. hieu ((ve cai) or (ve cham)) xuc van hanh tai cuc tre*.