Perhaps you should try some spelling variations:
day hanh » day nhanh, day thanh, dao hanh
thuc day » thuc dan, thuc vat
te sach » toc sach
ve cham » va cham, ve chat, vu cham
cua duc » cua tuc, cua nuoc, cua quoc
van hoc » van hoa
van hoi » van hoa, van hoe, van loi
y dang » ky dang, 2 dang, _ dang
vi cua » vai cua, di cua
ve cai » va cai, ve cac, ve tai

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 y dang ((van hoi) OR (van hoc)). hieu ((ve cai) or (ve cham)) thuc day hanh vi cua duc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y dang ((van hoi) OR (van hoc)). hieu ((ve cai) OR (ve cham)) thuc day hanh vi cua duc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y dang ((van hoi) OR (van hoc)). hieu ((ve cai) or (ve cham)) thuc day hanh vi cua duc".
• Adding a wildcard symbol may retrieve word variants: te sach y dang ((van hoi) OR (van hoc)). hieu ((ve cai) or (ve cham)) thuc day hanh vi cua duc*.