Perhaps you should try some spelling variations:
dang maut » dang mat, dang vat, dong mau
cham luc » cham soc, nhan luc, cham cuu
dang mau » dong mau, dang van, dang su
hanh tai » thanh tai, hang tai, han tai
tu sach » thu sach, su sach, te sach
cuc tre » duc tre, cuu tre, cuc thue
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
luc va » duc 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 sach ky ((dang mau) or (dang maut)) hoi. hieu ve cham luc va hanh tai ((cuc tre) or (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((dang mau) OR (dang maut)) hoi. hieu ve cham luc va hanh tai ((cuc tre) OR (cua tre)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((dang mau) or (dang maut)) hoi. hieu ve cham luc va hanh tai ((cuc tre) or (cua tre))*.