Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nang ma » tang ma, sang ma, nang cao
va hanh » van hanh, va thanh, va danh
tu sac » tu sach, tu cac, tu san
ma hoi » mai hoi, xa hoi, ma hoa
ve cac » va cac, vien cac
va cao » va cac, va co, va dao
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: ((tu sac) or (thu sach)) ky nang ma hoi. hieu ((ve cac) or (va cao)) duc va hanh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (thu sach)) ky nang ma hoi. hieu ((ve cac) OR (va cao)) duc va hanh vi cua vat.
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (thu sach)) ky nang ma hoi. hieu ((ve cac) or (va cao)) duc va hanh vi cua vat*.