Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
thu nang » thi nang, thu bang, tho nang
va thanh » gia thanh, ban thanh, va tinh
thu hang » thi hang, thuc hanh, thu huong
chat xuc » chat huu, cam xuc, chao xu
va hanh » van hanh, va danh, ban hanh
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
dai va » mai va

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