Perhaps you should try some spelling variations:
tan hanh » tan thanh, tang hanh, toan hanh
tang van » dang van, hoang van, trong van
hieu van » hieu va, thien van, lieu va
te sach » toc sach
hanh di » hanh vi, hanh de, hang di
cac duc » cac du, cao duc, cac dac
hieu ve » hieu va
sach lo » sach dao, sach doi, sach hoi
nang ma » tang ma, sang ma, nang cao
cua tuc » cua duc, cua tu, cua thuoc
di cua » dai cua, doi cua, de 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 lo ((nang ma) or (tang van)) hoi. ((hieu ve) OR (hieu van)) cac duc tan hanh di cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach lo ((nang ma) OR (tang van)) hoi. ((hieu ve) OR (hieu van)) cac duc tan hanh di cua tuc*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach lo ((nang ma) or (tang van)) hoi. ((hieu ve) OR (hieu van)) cac duc tan hanh di cua tuc*".