Perhaps you should try some spelling variations:
nham nang » phap nang, cam nang, kha nang
sach nham » sach nha, sach tham, sach han
mai khoi » mai khoa, cac khoi, dai khoa
thanh ve » hanh ve, thanh va, thanh vien
tai khoa » da khoa, noi khoa
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
cao duc » dao duc, cao suc, giao duc
cua tre » cua te, cuu tre, cua triet
cam duc » cam xuc, pham duc, nam duoc
hieu ve » hieu va, hieu van
ve cua » le cua, de cua, te cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach nham nang ((mai khoi) OR (tai khoa)). hieu ve ((cam duc) or (cao duc)) va thanh ve cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach nham nang ((mai khoi) OR (tai khoa)). hieu ve ((cam duc) OR (cao duc)) va thanh ve cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach nham nang ((mai khoi) OR (tai khoa)). hieu ve ((cam duc) or (cao duc)) va thanh ve cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach nham nang ((mai khoi) OR (tai khoa)). hieu ve ((cam duc) or (cao duc)) va thanh ve cua tre*.