Perhaps you should try some spelling variations:
thuc dant » thuoc dang, thuc hanh, thuc vat
thuc dan » thuc hanh, hoc dan, thuc vat
vai cua » dai cua, hai cua, lai cua
sach ky » sac ky, sach y, sach ty
vu sach » vu bach, su sach, vu khach
hieu ve » hieu va, hieu van
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
ve nam » he nam, va nam, le nam
ma hoi » mai hoi, xa hoi, ma hoa
vi 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: vu sach ky sang ma hoi. hieu ve nam ((thuc dan) or (thuc dant)) hanh ((vi cua) OR (vai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky sang ma hoi. hieu ve nam ((thuc dan) OR (thuc dant)) hanh ((vi cua) OR (vai cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky sang ma hoi. hieu ve nam ((thuc dan) or (thuc dant)) hanh ((vi cua) OR (vai cua)) te".
• Adding a wildcard symbol may retrieve word variants: vu sach ky sang ma hoi. hieu ve nam ((thuc dan) or (thuc dant)) hanh ((vi cua) OR (vai cua)) te*.