Perhaps you should try some spelling variations:
vat trang » vat trong, van trang, nhat trang
thuoc sac » thuoc sach, thuoc dac, thuoc sai
cuu thuc » cuu tac
va trang » va trung, va thanh, va nang
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
va cuu » va cau, va chu, va huu
vai va » mai va, dai va, hai va
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: thuoc sac ky nang ma hoi. hieu va cuu thuc ((vat trang) or (va trang)) vai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sac ky nang ma hoi. hieu va cuu thuc ((vat trang) OR (va trang)) vai va thiet.
• Adding a wildcard symbol may retrieve word variants: thuoc sac ky nang ma hoi. hieu va cuu thuc ((vat trang) or (va trang)) vai va thiet*.