Perhaps you should try some spelling variations:
cuc triet » cua triet, su triet, cac trieu
bach tuoc » sach duoc, sach nuoc
hanh tai » thanh tai, hang tai, han tai
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
bac tuc » bac tu, bac thua
va hanh » van hanh, va thanh, va danh
y nang » ly nang, v nang, may 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 (ky nang)) xa hoi. hieu va ((bac tuc) or (bach tuoc)) va hanh tai cuc triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (ky nang)) xa hoi. hieu va ((bac tuc) OR (bach tuoc)) va hanh tai cuc triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) OR (ky nang)) xa hoi. hieu va ((bac tuc) or (bach tuoc)) va hanh tai cuc triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) OR (ky nang)) xa hoi. hieu va ((bac tuc) or (bach tuoc)) va hanh tai cuc triet*.