Perhaps you should try some spelling variations:
thuy hanh » thuc hanh, thuy anh, thuy canh
su triet » su viet, su tien, ve triet
thu hanh » thuc hanh, thu thanh, thi hanh
va triet » va thiet, va trien, ve triet
hanh hai » thanh hai, nhanh hai, hang hai
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va, hieu van
ve am » va am

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 ((thu hanh) OR (thuy hanh)) xa hoi. hieu ve am thuc va hanh hai ((va triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((thu hanh) OR (thuy hanh)) xa hoi. hieu ve am thuc va hanh hai ((va triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((thu hanh) OR (thuy hanh)) xa hoi. hieu ve am thuc va hanh hai ((va triet) or (su triet))".
• Adding a wildcard symbol may retrieve word variants: su sach ((thu hanh) OR (thuy hanh)) xa hoi. hieu ve am thuc va hanh hai ((va triet) or (su triet))*.