Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
ban hang » ngan hang
vu sach » vu bach, su sach, vu khach
cam tuc » cam xuc, cam tu, dam thuc
hieu va » lieu va, hieu qua
y nang » ky nang, ly nang, v nang
vi cua » vai cua
di cua » dai cua, doi cua, de cua
x hoi » xa hoi, o hoi, x ho

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 y nang x hoi. hieu va ((cam tuc) OR (nam thuc)) ban hang ((vi cua) or (di cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang x hoi. hieu va ((cam tuc) OR (nam thuc)) ban hang ((vi cua) OR (di cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y nang x hoi. hieu va ((cam tuc) OR (nam thuc)) ban hang ((vi cua) or (di cua)) triet".
• Adding a wildcard symbol may retrieve word variants: vu sach y nang x hoi. hieu va ((cam tuc) OR (nam thuc)) ban hang ((vi cua) or (di cua)) triet*.