Perhaps you should try some spelling variations:
lang van » dang van, hoang van, giang van
tang van » dang van, hoang van, trong van
te sach » toc sach
va hanh » van hanh, va thanh, va danh
cac toc » cac toi, cac nuoc, cac thoi
cac tuc » cac tu, cac tac, cac nuoc
cua duc » cua tuc, cua nuoc, cua quoc
hieu ve » hieu va, hieu van
sach o » sach lo, sac o, sach y
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 o ((lang van) or (tang van)) hoe. hieu ve ((cac tuc) OR (cac toc)) va hanh vi cua duc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach o ((lang van) OR (tang van)) hoe. hieu ve ((cac tuc) OR (cac toc)) va hanh vi cua duc*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach o ((lang van) or (tang van)) hoe. hieu ve ((cac tuc) OR (cac toc)) va hanh vi cua duc*".