Perhaps you should try some spelling variations:
duong sinh » duong minh, duong manh, trong sinh
dung sinh » dang sinh, dung ninh, dung vinh
cua triet » cua viet, su triet, va triet
nam thuc » nam thuoc, am thuc, nam thu
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 nam » van nam, ha nam, va nay
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 nam thuc ((dung sinh) or (duong sinh)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky lang xa hoi. hieu va nam 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 nam thuc ((dung sinh) or (duong sinh)) vi cua triet*.