Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
va dinh » van dinh, va kinh, va tinh
va danh » va dan, va hanh, dia danh
vu sach » vu bach, su sach, vu khach
va pham » van pham, va phat, va phap
hieu va » lieu va, hieu qua
ty nang » ty xang, ty hang, ly nang
ma hoi » mai hoi, xa hoi, ma hoa
tu cua » hu cua, vu cua
cua te » cua tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((ty nang) OR (ky nang)) ma hoi. hieu va pham thuc ((va danh) OR (va dinh)) tu cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ((ty nang) or (ky nang)) ma hoi. hieu va pham thuc ((va danh) OR (va dinh)) tu cua te~".
• Adding a wildcard symbol may retrieve word variants: vu sach ((ty nang) or (ky nang)) ma hoi. hieu va pham thuc ((va danh) OR (va dinh)) tu cua te*.