Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
va tinh » may tinh
te sac » te sach, te san
te cac » tu cac, ve cac, te cao
va nam » van nam, ha nam, va nay
vi cua » vai cua, di cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sac) or (te cac)) ky nang x ho. hieu va nam thuoc ((va hanh) or (va tinh)) vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (te cac)) ky nang x ho. hieu va nam thuoc ((va hanh) OR (va tinh)) vi cua te.
• Adding a wildcard symbol may retrieve word variants: ((te sac) or (te cac)) ky nang x ho. hieu va nam thuoc ((va hanh) or (va tinh)) vi cua te*.