Perhaps you should try some spelling variations:
manh thang » danh thang, minh thang, nhanh thang
thien van » thi van
hieu van » hieu va, lieu va, hieu ve
duc manh » suc manh, duc anh, duc minh
giau cua » gian cua, gia cua, dieu cua
te sach » toc sach
sach ky » sac ky, sach y, sach ty
cao duc » dao duc, cao suc, giao duc
via cua » gia cua, gian cua, rija cua
x hoi » xa hoi, o hoi, x ho

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 nang x hoi. ((hieu van) OR (thien van)) cao duc manh thang ((via cua) or (giau cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang x hoi. ((hieu van) OR (thien van)) cao duc manh thang ((via cua) OR (giau cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang x hoi. ((hieu van) OR (thien van)) cao duc manh thang ((via cua) or (giau cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang x hoi. ((hieu van) OR (thien van)) cao duc manh thang ((via cua) or (giau cua)) tre*.