Perhaps you should try some spelling variations:
hanh dinh » thanh dinh, hinh dinh, hanh tinh
dinh cuu » dinh chi
hieu cua » hieu qua, dieu cua, bieu cua
va hanh » van hanh, va thanh, va danh
cac xuc » cam xuc, cac nuoc, chat xuc
tu sach » thu sach, te sach, tu cach
ky tang » ky nang, ky dang, kho tang
ky lang » ky nang, ky dang, tay lang
su sach » so sach, vu sach
cuu tre » cua tre, cau tren, cau treo
xuc va » duc va, tuc va, luc 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) or (su sach)) ((ky lang) OR (ky tang)) van hoa. hieu cua cac xuc va hanh dinh cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ((ky lang) OR (ky tang)) van hoa. hieu cua cac xuc va hanh dinh cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ((ky lang) OR (ky tang)) van hoa. hieu cua cac xuc va hanh dinh cuu tre*".