Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh dat » thanh san, thanh hai, thanh van
thi cong » tai cong, thien cong
hieu va » lieu va, hieu qua
ty hang » ly hang, ty xang, thi hang
dat cua » dai cua, day cua, mat cua
te sach » toc sach
va coc » va cuoc, va cac, va hoc
luc va » tuc va, loc va
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: te sach ((ty hang) or (thi cong)) x hoi. hieu va coc ((luc va) OR (duc va)) thanh dat cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ty hang) OR (thi cong)) x hoi. hieu va coc ((luc va) OR (duc va)) thanh dat cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ty hang) or (thi cong)) x hoi. hieu va coc ((luc va) OR (duc va)) thanh dat cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ((ty hang) or (thi cong)) x hoi. hieu va coc ((luc va) OR (duc va)) thanh dat cua triet*.