Perhaps you should try some spelling variations:
thien van » thi van
cach hoi » cach thoi, cach noi, sach hoi
cach hoc » cach thuc, cach thoi, dich hoc
cau treo » cau theo, cau tren, cau triet
lang xa » lang ha, dang xay, lang van
van cac » van hac, van cau, van bac
cac tuc » cac toc, cac tu, cac tac
xa hanh » xa thanh, xa khanh, va hanh
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su ((cach hoi) OR (cach hoc)) lang xa hoi. thien van cac tuc xa hanh vi ((cau treo) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((cach hoi) OR (cach hoc)) lang xa hoi. thien van cac tuc xa hanh vi ((cau treo) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((cach hoi) OR (cach hoc)) lang xa hoi. thien van cac tuc xa hanh vi ((cau treo) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: su ((cach hoi) OR (cach hoc)) lang xa hoi. thien van cac tuc xa hanh vi ((cau treo) or (cua te))*.