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