Perhaps you should try some spelling variations:
thanh duc » than duc, thinh duc, thanh dung
thach duc » thach thuc, than duc, thinh duc
hanh thai » nhanh thai, hinh thai, hanh tai
thai cua » than cua, tai cuc, tri cua
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 hanh » van hanh, va thanh, va danh
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 hanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang cao hoi. hieu va ((thanh duc) OR (thach duc)) va hanh thai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang cao hoi. hieu va ((thanh duc) or (thach duc)) va hanh thai cua tre*.