Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
tu sach » thu sach, su sach, te sach
dinh ve » dinh ket, dinh van
va dinh » van dinh, va kinh, va tinh
thuc va » thuc vat, thuc dan, thuc day
hieu va » lieu va
sach ty » sach y, sach tu, sach thu
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
ve cua » le cua, de cua, te cua
cua tu » cua tuc, cua su, cua cu

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