Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh vai » hanh va, hanh tai, hanh van
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
cao hoi » cau hoi, co hoi, cao hoc
hieu va » lieu va, hieu qua
hac tuc » thac toc, thai tuc
tuc ban » thuc ban, truc ban, tu ban
cua tre » cua te, cuu tre, dua tren
va hac » van hac, va khac, va cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky nang cao hoi. hieu va hac tuc ban ((hanh vai) or (hanh vi)) ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang cao hoi. hieu va hac tuc ban ((hanh vai) OR (hanh vi)) ((cua tre) OR (cua triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang cao hoi. hieu va hac tuc ban ((hanh vai) or (hanh vi)) ((cua tre) OR (cua triet))*".