Perhaps you should try some spelling variations:
chay tren » thai tren, ca tren, cau tren
thien va » thien van, tien va, thien tai
hanh lai » hanh lam, hanh tai, thanh lap
chau tre » chau tho, cho tre, cau tra
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang co » nang cao, nang doc, nang noi
va cham » va chat, va tham
co hoi » co hoc, co loi
xuc va » tuc va, luc va, xac 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 nang co hoi. thien va cham ((xuc va) or (duc va)) hanh lai ((chau tre) OR (chay tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang co hoi. thien va cham ((xuc va) OR (duc va)) hanh lai ((chau tre) OR (chay tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang co hoi. thien va cham ((xuc va) or (duc va)) hanh lai ((chau tre) OR (chay tren))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang co hoi. thien va cham ((xuc va) or (duc va)) hanh lai ((chau tre) OR (chay tren))*.