Perhaps you should try some spelling variations:
va trien » va truyen, va thiet, va tuyen
va triet » va thiet, ve triet, cua triet
hanh hai » thanh hai, nhanh hai, hang hai
dang xay » dang van, van xay
va hanh » van hanh, va thanh, va danh
cua tuc » cua duc, cua tu, cua thuoc
sach ky » sac ky, sach y, sach kem
xay hoi » xa hoi, tay hoi, cay phoi
sach ty » sach y, sach tu, sach thu
qua cua » quan cua, quang cua, qua quan
tuc va » thuc va, truc va, tuc xa

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: so ((sach ky) OR (sach ty)) dang xay hoi. hieu qua cua tuc va hanh hai ((va triet) OR (va trien))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach ky) OR (sach ty)) dang xay hoi. hieu qua cua tuc va hanh hai ((va triet) or (va trien))~".
• Adding a wildcard symbol may retrieve word variants: so ((sach ky) OR (sach ty)) dang xay hoi. hieu qua cua tuc va hanh hai ((va triet) or (va trien))*.