Perhaps you should try some spelling variations:
phap thuc » phap thu, phap hoc, phap tu
nham thuc » nhan thuc, nam thuc, nham thu
hoi dang » hoi dan, hoi lang, hoi dong
dang xay » dang van, van xay
sach hoi » sach doi, sach moi, cach thoi
su sach » so sach, vu sach
cua tre » cuu tre, cua triet, dua tren
xay hoi » xa hoi, tay hoi, cay phoi
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
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: su sach hoi dang xay hoi. hieu va ((nham thuc) OR (phap thuc)) va hanh va ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach hoi dang xay hoi. hieu va ((nham thuc) or (phap thuc)) va hanh va ((cua tre) OR (cua te))~".
• Adding a wildcard symbol may retrieve word variants: su sach hoi dang xay hoi. hieu va ((nham thuc) or (phap thuc)) va hanh va ((cua tre) OR (cua te))*.