Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hien tu » khien tu, dien tu
tu cham » toc cham, thi cham
danh di » danh du, xanh di, danh dien
dang de » dang deo, dung de, dang do
x hoi » xa hoi, o hoi, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty nang ((x hoi) OR (x ho)). hien tu cham duc va ((danh di) or (dang de)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang ((x hoi) OR (x ho)). hien tu cham duc va ((danh di) OR (dang de)) su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang ((x hoi) OR (x ho)). hien tu cham duc va ((danh di) or (dang de)) su triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ((x hoi) OR (x ho)). hien tu cham duc va ((danh di) or (dang de)) su triet*.