Perhaps you should try some spelling variations:
nha thuoc » nha nuoc, nhan thuc, nha hoc
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 nha » va nho, ve nha
vi cua » vai cua, di cua
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: ((te sac) or (te cac)) ky nang x ho. hieu va nha thuoc ((va hanh) or (va tinh)) vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (te cac)) ky nang x ho. hieu va nha thuoc ((va hanh) OR (va tinh)) vi cua tu.
• Adding a wildcard symbol may retrieve word variants: ((te sac) or (te cac)) ky nang x ho. hieu va nha thuoc ((va hanh) or (va tinh)) vi cua tu*.