Perhaps you should try some spelling variations:
thuc dant » thuoc dang, thuc hanh, thuc vat
thuc dan » thuc hanh, hoc dan, thuc vat
cua tre » cua te, cuu tre, cua triet
thi lan » thi hanh, thi nang, thi lien
lan nam » van nam, dan nam, ban nam
sac ky » cac ky, sai ky
ma hoi » mai hoi, ma hoa, me hoi
vi cua » vai cua, di cua
tu sac » tu sach, tu cac, tu san

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 ky nang ((ma hoi) or (xa hoi)). thi lan nam ((thuc dan) or (thuc dant)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ((ma hoi) OR (xa hoi)). thi lan nam ((thuc dan) OR (thuc dant)) hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((ma hoi) or (xa hoi)). thi lan nam ((thuc dan) or (thuc dant)) hanh vi cua tre*.