Perhaps you should try some spelling variations:
manh nhan » danh nhan, anh nhan, minh nhan
dua tren » dung tren
nhan tai » hang tai, van tai, toan tai
duc manh » suc manh, duc anh, duc minh
hieu ve » hieu va, hieu van
sach ly » sach lo, sach ty, sach hay
cao duc » dao duc, cao suc, giao duc
ve cao » va cao, ve bao, ve cac
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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 ly) OR (sach y)) nang x hoi. hieu ve cao duc manh nhan tai ((dua tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ly) OR (sach y)) nang x hoi. hieu ve cao duc manh nhan tai ((dua tren) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ly) OR (sach y)) nang x hoi. hieu ve cao duc manh nhan tai ((dua tren) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ly) OR (sach y)) nang x hoi. hieu ve cao duc manh nhan tai ((dua tren) or (cua te))*.