Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
thanh hai » thanh phan, thanh hoa, thanh san
va triet » va thiet, va trien, ve triet
nang mai » nang ma, nang tai, lang mai
su sach » so sach, vu sach
mai hoi » mai khoi, dai hoi, lai hoi
luc va » tuc va, loc va
y nang » ky nang, ly nang, v nang
va ha » va hoa, va kha, va han

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang mai hoi. lieu va ha ((duc va) or (luc va)) thanh hai ((cua triet) OR (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang mai hoi. lieu va ha ((duc va) OR (luc va)) thanh hai ((cua triet) OR (va triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang mai hoi. lieu va ha ((duc va) or (luc va)) thanh hai ((cua triet) OR (va triet))*".