Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
toc sach » hoc sach, doc sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
ve phat » va phat, te phat, de phat
hanh ve » hanh vi, hanh va, hanh kem
duc van » duc va, duc tan, duc manh
tu cach » tu cac
hang xa » hoang xa, hang va, hang ca
tu hang » thu hang, tu hanh, tu hung
ve phan » va phan, ke phan, vi phan
ve cau » ke cau, va cau, ve cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (toc sach)) tu hang xa hoi. hieu ((ve phan) or (ve phat)) duc van hanh ve cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (toc sach)) tu hang xa hoi. hieu ((ve phan) OR (ve phat)) duc van hanh ve cau treo.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (toc sach)) tu hang xa hoi. hieu ((ve phan) or (ve phat)) duc van hanh ve cau treo*.