Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
hanh mai » hanh ma, hanh mau, hanh may
te sach » toc 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
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa
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: te sach ky nang ma hoi. lieu va cam ((tuc va) or (thuc dan)) hanh mai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ma hoi. lieu va cam ((tuc va) OR (thuc dan)) hanh mai va thiet.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ma hoi. lieu va cam ((tuc va) or (thuc dan)) hanh mai va thiet*.