Perhaps you should try some spelling variations:
thanh duc » than duc, thinh duc, thanh dung
thach duc » thach thuc, than duc, thinh duc
danh lai » danh sai, gianh lai, dinh lam
te sach » toc sach
sach ky » sac ky, sach y, sach ty
cao hoi » cau hoi, co hoi, cao hoc
hieu va » lieu va, hieu qua
va danh » va dinh, va dan, va hanh
lai cua » dai cua, hai cua, lai chau
cua tre » cua te, cuu tre, cua triet

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 nang cao hoi. hieu va ((thanh duc) OR (thach duc)) va danh lai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang cao hoi. hieu va ((thanh duc) OR (thach duc)) va danh lai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang cao hoi. hieu va ((thanh duc) OR (thach duc)) va danh lai cua tre*.