Perhaps you should try some spelling variations:
hanh dinh » thanh dinh, hinh dinh, hanh tinh
dinh cua » dinh cuu, sinh cua, dinh cu
hoc giai » hoc giao, hoc dai, so giai
te sach » toc sach
hoc bai » hoc dai
va phau » va phat, va phap, va phan
sach ly » sach y, sach lo, sach ty
hieu va » lieu va, hieu qua
nang co » nang cao, nang doc, nang noi
cua tu » cua tuc, cua su, cua cu

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 ly ((nang co) or (nang luc)) hoi. hieu va phau ((hoc bai) OR (hoc giai)) hanh dinh cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ly ((nang co) OR (nang luc)) hoi. hieu va phau ((hoc bai) OR (hoc giai)) hanh dinh cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ly ((nang co) or (nang luc)) hoi. hieu va phau ((hoc bai) OR (hoc giai)) hanh dinh cua tu".
• Adding a wildcard symbol may retrieve word variants: te sach ly ((nang co) or (nang luc)) hoi. hieu va phau ((hoc bai) OR (hoc giai)) hanh dinh cua tu*.