Perhaps you should try some spelling variations:
pham thuc » phap thuc, nham thuc, pham thu
pham chuc » pham duc, pham huu, kham chua
vu sach » vu bach, su sach, vu khach
danh tu » anh tu, doanh thu
va danh » va dinh, va dan, va hanh
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
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
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 ((ma hoi) OR (mai hoi)). hieu va ((pham thuc) OR (pham chuc)) va danh tu 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) OR (pham chuc)) va danh tu cua te~".
• Adding a wildcard symbol may retrieve word variants: vu sach ty nang ((ma hoi) or (mai hoi)). hieu va ((pham thuc) OR (pham chuc)) va danh tu cua te*.