Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, va thuoc
van hanh » van thanh, ban hanh, van anh
cua nuoc » cua nguoi, nha nuoc, cap nuoc
nang mai » nang ma, nang tai, lang mai
hanh di » hanh vi, hanh de, hang di
vu sach » vu bach, su sach, vu khach
sach ly » sach y, sach lo, sach ty
hieu va » lieu va, hieu qua
mai hoi » mai khoi, dai hoi, lai hoi
ly nang » ky nang, ly hang, ly vang
xuc van » duc van, luc van, vuc van
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ly nang mai hoi. hieu va cam xuc van hanh di ((((cua quoc) OR (cua nuoc))) or (cua thuoc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ly nang mai hoi. hieu va cam xuc van hanh di ((((cua quoc) OR (cua nuoc))) OR (cua thuoc)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ly nang mai hoi. hieu va cam xuc van hanh di ((((cua quoc) OR (cua nuoc))) or (cua thuoc))".
• Adding a wildcard symbol may retrieve word variants: vu sach ly nang mai hoi. hieu va cam xuc van hanh di ((((cua quoc) OR (cua nuoc))) or (cua thuoc))*.