Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
ban hanh » ban hang
hieu van » hieu va, thien van, lieu va
thu nang » thi nang, thu bang, tho nang
thu hang » thi hang, thuc hanh, thu huong
van hac » van hoc, van ha, van hai
hac xuc » chat xuc
va danh » va dinh, va dan, va hanh
su sach » so sach, vu sach
ma hoi » mai hoi, xa hoi, ma hoa

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: su sach ((thu nang) OR (thu hang)) ma hoi. hieu van hac xuc ((va danh) OR (ban hanh)) va su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((thu nang) OR (thu hang)) ma hoi. hieu van hac xuc ((va danh) or (ban hanh)) va su triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ((thu nang) OR (thu hang)) ma hoi. hieu van hac xuc ((va danh) or (ban hanh)) va su triet*.