Perhaps you should try some spelling variations:
manh hanh » xanh hanh, danh thanh, minh thanh
hieu van » hieu va, thien van, lieu va
duc manh » suc manh, duc anh, duc minh
te sach » toc sach
sach ty » sach y, sach tu, sach thu
mang xa » mang may, dang xay, mang cua
lang xa » lang ha, dang xay, lang van
van cac » van hac, van cau, van bac
cac duc » cac du, cao duc, cac dac
vi cua » vai cua, di cua
cua cu » cua chu, cua cau, cua su

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 ty ((mang xa) or (lang xa)) hoi. hieu van cac duc manh hanh vi cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((mang xa) OR (lang xa)) hoi. hieu van cac duc manh hanh vi cua cu.
• Adding a wildcard symbol may retrieve word variants: te sach ty ((mang xa) or (lang xa)) hoi. hieu van cac duc manh hanh vi cua cu*.