Perhaps you should try some spelling variations:
tan hanh » tan thanh, tang hanh, toan hanh
hieu van » hieu va, thien van, lieu va
tay lang » tai lang, tay tang, tay quang
ky dang » ky nang, ky danh
van cao » van dao, van bao, van hao
cao duc » dao duc, cao suc, giao duc
va chua » vua chua, ca chua, va chu
te sach » toc sach
ha hoi » hoa hoi, ha noi, xa hoi
ma cua » ca cua, manh cua, mang 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 ((tay lang) or (ky dang)) ha hoi. hieu van cao duc tan hanh ((ma cua) or (va chua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((tay lang) OR (ky dang)) ha hoi. hieu van cao duc tan hanh ((ma cua) OR (va chua)) triet.
• Adding a wildcard symbol may retrieve word variants: te sach ((tay lang) or (ky dang)) ha hoi. hieu van cao duc tan hanh ((ma cua) or (va chua)) triet*.