Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
ban hanh » ban hang
cac cuoc » cac nuoc, ca cuoc, cac quoc
nang mai » nang ma, nang tai, lang mai
sach ty » sach y, sach thu, xach tay
mai hoi » mai khoi, dai hoi, lai hoi
sach tu » sach thu, cach tu, sach uu
vi cua » vai cua, di cua

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 tu)) nang mai hoi. hieu hien ((cac cuoc) or (cam xuc)) ban hanh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach tu)) nang mai hoi. hieu hien ((cac cuoc) OR (cam xuc)) ban hanh vi cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ty) OR (sach tu)) nang mai hoi. hieu hien ((cac cuoc) or (cam xuc)) ban hanh vi cua vat".
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) OR (sach tu)) nang mai hoi. hieu hien ((cac cuoc) or (cam xuc)) ban hanh vi cua vat*.