Perhaps you should try some spelling variations:
thuc day » thuc dan, thuc vat
hanh may » hanh ma, hanh mau, hanh ngay
va thieu » va thiet, va hieu, va tieu
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
may va » may vi, day 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. lieu va cac ((tuc xa) or (thuc day)) hanh may va thieu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ma hoi. lieu va cac ((tuc xa) OR (thuc day)) hanh may va thieu.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ma hoi. lieu va cac ((tuc xa) or (thuc day)) hanh may va thieu*.