Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tieu hieu » tieu bieu, thien hieu, tieu khien
hieu cac » hieu luc, hieu va, hieu van
toc sach » hoc sach, doc sach, thuoc sach
nang xa » nang x, lang xa, nang ma
sach ky » sac ky, sach y, sach ty
thuc va » thuc vat, thuc dan, thuc day
hanh va » hang va, hanh vi
xac va » tac va, ac va, bac va
tuc va » truc va, tuc xa, duc va
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 xa hoi. tieu hieu cac ((xac va) or (((tuc va) OR (thuc va)))) hanh va cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang xa hoi. tieu hieu cac ((xac va) OR (((tuc va) OR (thuc va)))) hanh va cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky nang xa hoi. tieu hieu cac ((xac va) or (((tuc va) OR (thuc va)))) hanh va cua triet".
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang xa hoi. tieu hieu cac ((xac va) or (((tuc va) OR (thuc va)))) hanh va cua triet*.