Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
thi nang » ki nang, thi hanh
cau treo » cau theo, cau tren, cau trieu
thi cong » tai cong, thien cong
gia hanh » gia thanh, giao hanh, gia anh
hanh ve » hanh vi, hanh va, hanh kem
so sach » so sanh, bo sach, co sach
hieu ve » hieu va, hieu van
du gia » duc gia, dau gia, vu gia
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ((thi nang) or (thi cong)) xa hoi. hieu ve cac du gia hanh ve ((cau treo) OR (cau triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((thi nang) OR (thi cong)) xa hoi. hieu ve cac du gia hanh ve ((cau treo) OR (cau triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((thi nang) or (thi cong)) xa hoi. hieu ve cac du gia hanh ve ((cau treo) OR (cau triet))".
• Adding a wildcard symbol may retrieve word variants: so sach ((thi nang) or (thi cong)) xa hoi. hieu ve cac du gia hanh ve ((cau treo) OR (cau triet))*.