Perhaps you should try some spelling variations:
duong sinh » duong minh, duong manh, trong sinh
nham thuc » nhan thuc, nam thuc, nham thu
dung sinh » dang sinh, dung ninh, dung vinh
cua triet » cua viet, su triet, va triet
te sach » toc sach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
va nham » va cham, va tham, va nha
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky lang xa hoi. hieu va nham thuc ((dung sinh) OR (duong sinh)) vi cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky lang xa hoi. hieu va nham thuc ((dung sinh) OR (duong sinh)) vi cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ky lang xa hoi. hieu va nham thuc ((dung sinh) OR (duong sinh)) vi cua triet*.