Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
dang xay » dang van, van xay
danh vai » danh sai, danh va, doanh van
va trien » va truyen, va thiet, va tuyen
xay hoi » xa hoi, tay hoi, cay phoi
sach ky » sach y, sach ty, sach kem
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
sac ky » cac ky, sai ky
vai va » mai va, dai va, hai va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((sach ky) or (sac ky)) dang xay hoi. hieu ve pham thuc va danh vai va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((sach ky) OR (sac ky)) dang xay hoi. hieu ve pham thuc va danh vai va trien.
• Adding a wildcard symbol may retrieve word variants: hoc ((sach ky) or (sac ky)) dang xay hoi. hieu ve pham thuc va danh vai va trien*.