Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
danh vai » danh sai, danh va, doanh van
va trien » va truyen, va thiet, va tuyen
sach ky » sach y, sach ty, sach kem
lang xa » lang ha, dang xay, lang van
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)) lang xa hoi. hieu ve pham thuc va danh vai va trien~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((sach ky) OR (sac ky)) lang xa hoi. hieu ve pham thuc va danh vai va trien".
• Adding a wildcard symbol may retrieve word variants: hoc ((sach ky) OR (sac ky)) lang xa hoi. hieu ve pham thuc va danh vai va trien*.