Perhaps you should try some spelling variations:
dinh cuu » dinh chi
doc sach » hoc sach, toc sach, nuoc sach
dan dinh » dang dinh, doan dinh, van dinh
nang co » nang cao, nang doc, nang noi
cam luc » cam xuc, cau luc
hieu va » lieu va, hieu qua
hoc cac » hoc cao
cuu tre » cua tre, cau tren, cau treo
nang o » nang ho, nang ro, nang x
va cam » va cham, va cac, va cao
luc va » duc va, tuc va, loc va
va dan » ca dan, va dao, va dau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc cac) or (doc sach)) v ((nang o) OR (nang co)) hoc. hieu va cam luc va dan dinh cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc cac) OR (doc sach)) v ((nang o) OR (nang co)) hoc. hieu va cam luc va dan dinh cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc cac) or (doc sach)) v ((nang o) OR (nang co)) hoc. hieu va cam luc va dan dinh cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((hoc cac) or (doc sach)) v ((nang o) OR (nang co)) hoc. hieu va cam luc va dan dinh cuu tre*.