Perhaps you should try some spelling variations:
dua tren » dung tren
hieu van » hieu va, thien van, lieu va
nhan tai » hang tai, van tai, toan tai
duc manh » suc manh, duc anh, duc minh
han tai » hang tai, van tai, toan tai
tu sach » thu sach, su sach, te sach
bao duc » dao duc, bao luc, cao duc
van bao » van ban, van dao
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang
cua te » cua tu

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

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