Perhaps you should try some spelling variations:
manh hanh » xanh hanh, danh thanh, minh thanh
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
van pham » san pham, van phan, van phat
duc manh » suc manh, duc anh, duc minh
va triet » va trien, ve triet, cua triet
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang xa
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ty xang xa hoi. hieu van pham duc manh hanh vi ((va triet) OR (va thiet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty xang xa hoi. hieu van pham duc manh hanh vi ((va triet) OR (va thiet))".
• Adding a wildcard symbol may retrieve word variants: toc sach ty xang xa hoi. hieu van pham duc manh hanh vi ((va triet) OR (va thiet))*.