Perhaps you should try some spelling variations:
va trien » va truyen, va thiet, va tuyen
danh tai » doanh tai, dinh tai, hanh tai
dam thuc » am thuc, dan thuc, nam thuc
sach ky » sac ky, sach y, sach ty
va danh » va dinh, va dan, va hanh
su sach » so sach, vu sach
cam tuc » cam tu, nam thuc, nam truc
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 (dam thuc))) or (cam xuc)) va danh 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 (dam thuc))) OR (cam xuc)) va danh 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 (dam thuc))) or (cam xuc)) va danh tai va trien*".