Perhaps you should try some spelling variations:
su sach » so sach, vu sach
van han » van hanh, van phan, van nhan
nang ma » tang ma, sang ma, nang cao
va cham » va tham
van anh » van thanh, tuan anh, van minh
sach ky » sac ky, sach y, sach ty
va chat » van chat, va phat, cao chat
tai va » thai va, mai va, tri va
ma hoi » mai hoi, xa hoi, ma hoa
thiet* » thieu*

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. hieu ((va cham) OR (va chat)) xuc ((van han) or (van anh)) tai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ma hoi. hieu ((va cham) OR (va chat)) xuc ((van han) OR (van anh)) tai va thiet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang ma hoi. hieu ((va cham) OR (va chat)) xuc ((van han) or (van anh)) tai va thiet*".