Perhaps you should try some spelling variations:
tieu hieu » tieu bieu, thien hieu, tieu khien
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
hieu cac » hieu luc, hieu va, hieu van
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
hanh va » hang va, hanh vi
ma hoi » mai hoi, xa hoi, ma hoa
xac va » tac va, ac va, bac va
tuc va » thuc va, truc va, tuc xa
va cua » va chua, via cua, ca cua

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 ky nang ma hoi. tieu hieu cac ((xac va) or (tuc va)) hanh va cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang ma hoi. tieu hieu cac ((xac va) OR (tuc va)) hanh va cua triet.
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang ma hoi. tieu hieu cac ((xac va) or (tuc va)) hanh va cua triet*.