Perhaps you should try some spelling variations:
danh lai » danh sai, gianh lai, dinh lam
sach ty » sach y, sach tu, sach thu
lai cua » dai cua, hai cua, lai chau
va danh » va dinh, va dan, va hanh
cac duc » cac du, cao duc, cac dac
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
tang ma » mang may, tang van
nang ma » sang ma, nang cao, mang may
ve cac » va cac, vien cac
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: te ((sach ty) or (sac ky)) ((nang ma) or (tang ma)) hoi. hieu ve cac duc va danh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sac ky)) ((nang ma) OR (tang ma)) hoi. hieu ve cac duc va danh lai cua tre.
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (sac ky)) ((nang ma) or (tang ma)) hoi. hieu ve cac duc va danh lai cua tre*.