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 hai, minh lai, tinh bai
tinh lao » dinh lam, tinh nam, tinh va
su sach » so sach, vu sach
van cac » van hac, van cau, van bac
cac dam » cac dan, cac dai, cao dam
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((y nang) OR (v nang)) xa hoi. hieu van cac dam may ((tinh lai) or (tinh lao)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (v nang)) xa hoi. hieu van cac dam may ((tinh lai) OR (tinh lao)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) OR (v nang)) xa hoi. hieu van cac dam may ((tinh lai) or (tinh lao)) cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) OR (v nang)) xa hoi. hieu van cac dam may ((tinh lai) or (tinh lao)) cua triet*.