Perhaps you should try some spelling variations:
hoc nganh » hoc nhanh
cua triet » cua viet, va triet
hanh hai » thanh hai, nhanh hai, hang hai
nganh ky » nganh y, nganh xay, hanh ky
su triet » su viet, su tien, ve triet
hieu ve » hieu va, hieu van
van hoi » van hoc, van hoe, van loi
va hanh » van hanh, va thanh, va danh
ky lang » ky nang, ky dang, ky tang
dan va » doan va, dan ca, ban va
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc nganh ky lang ((van hoi) or (van hoa)). hieu ve cac dan va hanh hai ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc nganh ky lang ((van hoi) OR (van hoa)). hieu ve cac dan va hanh hai ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc nganh ky lang ((van hoi) or (van hoa)). hieu ve cac dan va hanh hai ((cua triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: hoc nganh ky lang ((van hoi) or (van hoa)). hieu ve cac dan va hanh hai ((cua triet) OR (su triet))*.