Perhaps you should try some spelling variations:
chat cuu » chat huu, chat cua, cham cuu
ban hang » ngan hang
dang tai » dang thai, dung tai, hang tai
tai khoa » da khoa, noi khoa
hang vi » hang va, hanh vi, hang di
sach ky » sach y, sach ty, sach kem
cuu ban » cuu van, cua ban, cuu san
vi cua » vai cua, di cua
cua te » cua tu
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) OR (sac ky)) dang tai khoa. ((hieu qua) or (lieu va)) chat cuu ban hang vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) dang tai khoa. ((hieu qua) OR (lieu va)) chat cuu ban hang vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sac ky)) dang tai khoa. ((hieu qua) or (lieu va)) chat cuu ban hang vi cua te".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sac ky)) dang tai khoa. ((hieu qua) or (lieu va)) chat cuu ban hang vi cua te*.