Perhaps you should try some spelling variations:
thien van » thi van
va trien » va truyen, va thiet, va tuyen
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
chat xuc » chat huu, cam xuc, chao xu
van chat » cao chat
thu nang » thi nang, thu hang, thu bang
sach thu » sach thue, sach thieu, sach tham
su sach » so sach, vu sach
lam va » nam va, dam va, lam ha
x hoi » o hoi, x ho, 5 hoi

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 nang ((x hoi) OR (xa hoi)). thien van chat xuc ((van hanh) or (ban hanh)) lam va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thu nang ((x hoi) OR (xa hoi)). thien van chat xuc ((van hanh) OR (ban hanh)) lam va trien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach thu nang ((x hoi) OR (xa hoi)). thien van chat xuc ((van hanh) or (ban hanh)) lam va trien".
• Adding a wildcard symbol may retrieve word variants: su sach thu nang ((x hoi) OR (xa hoi)). thien van chat xuc ((van hanh) or (ban hanh)) lam va trien*.