Perhaps you should try some spelling variations:
thanh lam » thanh lap, hanh lam, thanh nam
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
van cau » van dau, van hau, van chat
cau duc » cao duc, cau luc, chu duc
y nang » ky nang, ly nang, v nang
mo hoc » mon hoc, co hoc
lam su » lai su, lam so, lam vu
o hoc » co hoc, so hoc, y hoc

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 ((o hoc) OR (mo hoc)). hieu van cau duc va thanh lam su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ((o hoc) OR (mo hoc)). hieu van cau duc va thanh lam su triet".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ((o hoc) OR (mo hoc)). hieu van cau duc va thanh lam su triet*.