Perhaps you should try some spelling variations:
than duc » tran duc, phan duc, than doc
danh lai » danh sai, gianh lai, dinh lam
sach ky » sach y, sach ty, sach kem
cao hoi » cau hoi, co hoi, cao hoc
hieu va » lieu va, hieu qua
va than » va thanh, van than, va phan
va danh » va dinh, va dan, va hanh
lai cua » dai cua, hai cua, lai chau
cua tre » cua te, cuu tre, cua triet
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 ky) OR (sac ky)) nang cao hoi. hieu va than duc va danh lai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) OR (sac ky)) nang cao hoi. hieu va than duc va danh lai cua tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) OR (sac ky)) nang cao hoi. hieu va than duc va danh lai cua tre*.