Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
va thanh » gia thanh, ban thanh, va tinh
ma thanh » mai thanh, ha thanh, ta thanh
vai cua » dai cua, hai cua, lai cua
hieu va » lieu va, hieu qua
cao hoi » cau hoi, co hoi, cao hoc
va nam » van nam, ha nam, va nay
sac ky » cac ky, sai ky
cua tu » cua tuc, cua su, cua cu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach y) or (sac ky)) nang cao hoi. hieu va nam thuoc ((ma thanh) or (va thanh)) vai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach y) OR (sac ky)) nang cao hoi. hieu va nam thuoc ((ma thanh) OR (va thanh)) vai cua tu.
• Adding a wildcard symbol may retrieve word variants: tu ((sach y) or (sac ky)) nang cao hoi. hieu va nam thuoc ((ma thanh) or (va thanh)) vai cua tu*.