Perhaps you should try some spelling variations:
sang mai » sang ma, sang tai, lang mai
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
va dinh » van dinh, va kinh, va tinh
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
ky sang » ky nang, ky dang, ky tang
ve cac » va cac, vien cac
cua tu » cua tuc, cua su, cua cu

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 sang mai hoi. hieu ve cac xuc ((ban hanh) or (va dinh)) thai ((cua te) OR (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky sang mai hoi. hieu ve cac xuc ((ban hanh) OR (va dinh)) thai ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky sang mai hoi. hieu ve cac xuc ((ban hanh) or (va dinh)) thai ((cua te) OR (cua tu))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky sang mai hoi. hieu ve cac xuc ((ban hanh) or (va dinh)) thai ((cua te) OR (cua tu))*.