Perhaps you should try some spelling variations:
va trien » va truyen, va thiet, va tuyen
va thanh » gia thanh, ban thanh, va tinh
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va danh, ban hanh
su sach » so sach, vu sach
cam tuc » cam tu, nam thuc, dam thuc
dang ma » dang mau, dang mam, dang mat
ky dang » ky nang, ky danh
ma hoi » mai hoi, xa hoi, ma hoa
tai va » thai va, mai va, tri 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 dang ma hoi. hieu qua ((cam tuc) or (cam xuc)) ((va hanh) OR (va thanh)) tai va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky dang ma hoi. hieu qua ((cam tuc) OR (cam xuc)) ((va hanh) OR (va thanh)) tai va trien*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky dang ma hoi. hieu qua ((cam tuc) or (cam xuc)) ((va hanh) OR (va thanh)) tai va trien*".