Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
hoc sach » hoc sinh, hoc cac, hoc anh
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
hanh dai » hanh tai, hanh dao, vanh dai
va trien » va truyen, va thiet, va tuyen
sach ky » sac ky, sach y, sach ty
hieu vi » hieu voi, hieu va, hieu ve
ma hoi » mai hoi, xa hoi, me hoi
dai va » mai 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 nang ((ma hoi) OR (ma hoa)). hieu vi pham thuc van hanh dai va trien~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ky nang ((ma hoi) OR (ma hoa)). hieu vi pham thuc van hanh dai va trien".
• Adding a wildcard symbol may retrieve word variants: hoc sach ky nang ((ma hoi) OR (ma hoa)). hieu vi pham thuc van hanh dai va trien*.