Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
cham duc » pham duc, cham soc, pham duy
cuu tre » cua tre, cau tren, cau treo
danh di » danh du, xanh di, danh dien
va danh » va dinh, va dan, va hanh
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
ty hang » ly hang, ty xang, thi hang
ty nang » ky nang, ty xang, ly nang
ve cham » va cham, ve chat, vu cham

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) or (ty hang)) xa hoi. hieu ve cham duc va danh di ((cuu tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ty hang)) xa hoi. hieu ve cham duc va danh di ((cuu tre) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) or (ty hang)) xa hoi. hieu ve cham duc va danh di ((cuu tre) or (su triet))*.