Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban hanh » ban hang
sach ty » sach tu, sach thu, xach tay
hang xa » hoang xa, hang va, hang ca
hieu ve » hieu va, hieu van
cuu tre » cua tre, cau tren, cau treo
ve cac » va cac, vien cac
cac ly » cac ky, cac le, cam ly
ly ban » uy ban, lo ban, ly bai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ty) OR (sach y)) hang xa hoi. hieu ve cac ly ban hanh vi ((cuu tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach y)) hang xa hoi. hieu ve cac ly ban hanh vi ((cuu tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ty) OR (sach y)) hang xa hoi. hieu ve cac ly ban hanh vi ((cuu tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) OR (sach y)) hang xa hoi. hieu ve cac ly ban hanh vi ((cuu tre) or (cua triet))*.