Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
thanh dat » thanh san, thanh hai, thanh van
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
su triet » su viet, su tien, ve triet
van cac » van hac, van cau, van bac
cac duc » cac du, cao duc, cac dac
cua tre » cua te, cuu tre, dua tren
nang ma » tang ma, sang ma, nang cao
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

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

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