Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
va hanh » van hanh, va thanh, ban hanh
cua tre » cua te, cuu tre, dua tren
doc sac » doc sach, dac sac, hoc sach
lam xuc » cam xuc, lam duoc
van lam » van nam
cao hoi » cau hoi, co hoi, cao hoc
va danh » va dinh, va dan, dia danh
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc sac ky nang cao hoi. hieu van lam xuc ((va danh) or (va hanh)) hai ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sac ky nang cao hoi. hieu van lam xuc ((va danh) OR (va hanh)) hai ((cua tre) OR (cua triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc sac ky nang cao hoi. hieu van lam xuc ((va danh) or (va hanh)) hai ((cua tre) OR (cua triet))*".