Perhaps you should try some spelling variations:
thien van » thi van
va trien » va truyen, va thiet, va tuyen
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
mai hoi » mai khoi, dai hoi, lai hoi
van cau » van dau, van hau, van chat
cau luc » cau truc, cau phuc
va hanh » van hanh, va thanh, va danh
ma hoi » ma hoa, me hoi, va hoi
luc va » duc va, tuc va, loc va
vi va » vi van, vai va, vu va

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 ky nang ((((ma hoi) or (xa hoi))) or (mai hoi)). thien van cau luc va hanh vi va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((((ma hoi) OR (xa hoi))) OR (mai hoi)). thien van cau luc va hanh vi va trien.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((((ma hoi) or (xa hoi))) or (mai hoi)). thien van cau luc va hanh vi va trien*.