Perhaps you should try some spelling variations:
nang duoc » ngang duoc, nang doc, nganh duoc
thien van » thi van
duoc hoi » quoc hoi, duoc hoc, duoc si
va triet » va thiet, va trien, cua triet
ve triet » va trien, su triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
van lam » van nam
lam tuc » lam thuoc, lam truoc, luat tuc
xa hanh » xa thanh, xa khanh, va hanh

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 ky nang duoc hoi. thien van lam tuc xa hanh vi ((va triet) OR (ve triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang duoc hoi. thien van lam tuc xa hanh vi ((va triet) OR (ve triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang duoc hoi. thien van lam tuc xa hanh vi ((va triet) OR (ve triet))*.