Perhaps you should try some spelling variations:
thuy hanh » thuc hanh, thuy anh, thuy canh
va trien » va truyen, va thiet, va tuyen
thu hanh » thuc hanh, thu thanh, thi hanh
va triet » va thiet, ve triet, cua triet
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
xuc va » duc va, tuc va, luc va
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((thu hanh) OR (thuy hanh)) xa hoi. hieu ve cam xuc va hanh va ((va triet) or (va trien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((thu hanh) OR (thuy hanh)) xa hoi. hieu ve cam xuc va hanh va ((va triet) OR (va trien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((thu hanh) OR (thuy hanh)) xa hoi. hieu ve cam xuc va hanh va ((va triet) or (va trien))".
• Adding a wildcard symbol may retrieve word variants: tu sach ((thu hanh) OR (thuy hanh)) xa hoi. hieu ve cam xuc va hanh va ((va triet) or (va trien))*.