Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
danh vi » dinh vi, danh di, danh va
cam tuc » cam xuc, cam tu, nam thuc
ky lang » ky nang, ky tang, tay lang
hoa hoi » khoa hoi, hoa hoc, hoa doi
ky dang » ky nang, ky danh
van cam » van nam, van lam, van cau
tuc va » thuc va, truc va, tuc xa

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sinh ((ky lang) OR (ky dang)) hoa hoi. hieu van cam tuc va ((danh vi) OR (hanh vi)) cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sinh ((ky lang) or (ky dang)) hoa hoi. hieu van cam tuc va ((danh vi) OR (hanh vi)) cua triet~".
• Adding a wildcard symbol may retrieve word variants: hoc sinh ((ky lang) or (ky dang)) hoa hoi. hieu van cam tuc va ((danh vi) OR (hanh vi)) cua triet*.