Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
tinh lai » tinh lao, tinh hai, minh lai
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
cac cay » ca cay, cac cam, cac cau
cac cap » cao cap, cac cam, cac cau
va tinh » may tinh
lai cua » dai cua, hai cua, lai chau
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: so sach y nang xa hoi. hieu van ((cac cay) OR (cac cap)) va tinh lai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y nang xa hoi. hieu van ((cac cay) OR (cac cap)) va tinh lai cua triet".
• Adding a wildcard symbol may retrieve word variants: so sach y nang xa hoi. hieu van ((cac cay) OR (cac cap)) va tinh lai cua triet*.