Perhaps you should try some spelling variations:
minh thanh » dinh thanh, tinh thanh, hinh thanh
manh thanh » danh thanh, manh thang, anh thanh
cau tren » dau tren, ca tren, cau treo
tu sach » thu sach, su sach, te sach
cao duc » dao duc, cao suc, giao duc
hieu ve » hieu va, hieu van
cu tren » tu tren, dua tren
y nang » ky nang, ly nang, v nang
ve cao » va cao, ve bao, ve cac
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 y nang x hoi. hieu ve cao duc ((manh thanh) OR (minh thanh)) hai ((cau tren) or (cu tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang x hoi. hieu ve cao duc ((manh thanh) OR (minh thanh)) hai ((cau tren) OR (cu tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang x hoi. hieu ve cao duc ((manh thanh) OR (minh thanh)) hai ((cau tren) or (cu tren))".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. hieu ve cao duc ((manh thanh) OR (minh thanh)) hai ((cau tren) or (cu tren))*.