Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
dang sinh » dang dinh, khang sinh
dang hanh » dang thanh, ban hanh, dang van
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 tham » van tham, va cham, va thanh
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 tham thuc ((dang sinh) or (dang hanh)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky lang xa hoi. hieu va tham thuc ((dang sinh) OR (dang hanh)) vi cua triet.
• Adding a wildcard symbol may retrieve word variants: te sach ky lang xa hoi. hieu va tham thuc ((dang sinh) or (dang hanh)) vi cua triet*.