Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
toc sach » doc sach, thuoc sach, nuoc sach
nang hai » hang hai, nang tai, dang hai
van nang » van quang, van ban, van dong
cham xuc » cam xuc, chat xuc, cham soc
hoc sach » hoc sinh, hoc cac, hoc anh
va triet » va thiet, va trien, ve triet
nang ma » tang ma, sang ma, nang cao
va cham » va chat, va tham
xuc van » duc van, luc van, vuc van
ma hoi » mai hoi, xa hoi, ma hoa
y nang » ky nang, ly nang, v nang

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) or (hoc sach)) y nang ma hoi. lieu va cham xuc van nang hai ((cua triet) OR (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) y nang ma hoi. lieu va cham xuc van nang hai ((cua triet) OR (va triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (hoc sach)) y nang ma hoi. lieu va cham xuc van nang hai ((cua triet) OR (va triet))".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (hoc sach)) y nang ma hoi. lieu va cham xuc van nang hai ((cua triet) OR (va triet))*.