Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
su triet » su viet, su tien, ve triet
van hanh » van thanh, ban hanh, van anh
thuc van » thuc vat, thuc dan, thuc va
thu dang » thu hang, thu bang, thu dong
hieu va » lieu va, hieu qua
va nham » va cham, va tham, va nha
tu dang » tu dong, su dang, vu dang
hanh ki » hanh vi, hanh ky, hanh kien
tu sach » thu sach, su sach, te sach
ma hoi » mai hoi, xa hoi, ma hoa
ki su » ky su

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((tu dang) OR (thu dang)) ma hoi. hieu va nham thuc van hanh ki su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((tu dang) OR (thu dang)) ma hoi. hieu va nham thuc van hanh ki su triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((tu dang) OR (thu dang)) ma hoi. hieu va nham thuc van hanh ki su triet*.