Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
vu sach » vu bach, su sach, vu khach
va danh » va dinh, va dan, va hanh
thuc va » thuc vat, thuc dan, thuc day
va pham » van pham, va phat, va phap
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
mai hoi » mai khoi, dai hoi, lai hoi
ty nang » ky nang, ty xang, ty hang
ma hoi » xa hoi, ma hoa, me hoi
tu cua » hu cua
vu cua » hu cua

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 ((ma hoi) OR (mai hoi)). hieu va pham thuc va danh ((tu cua) OR (vu cua)) te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ty nang ((ma hoi) or (mai hoi)). hieu va pham thuc va danh ((tu cua) OR (vu cua)) te~".
• Adding a wildcard symbol may retrieve word variants: vu sach ty nang ((ma hoi) or (mai hoi)). hieu va pham thuc va danh ((tu cua) OR (vu cua)) te*.