Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
gianh lai » gian lan
va gianh » va gian, van giang, va giai
sang mai » sang ma, sang tai, lang mai
mai khoi » mai khoa, tai khoa, cac khoi
cua tre » cua te, cuu tre, cua triet
lai cua » dai cua, hai cua, lai chau
hieu ve » hieu va, hieu van
ky sang » ky nang, ky dang, ky tang
te bai » te bao, te tai, te ban
te sai » te tai, te lai, te hai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sai) or (te bai)) ky sang mai khoi. hieu ve ((nam thuoc) or (cam xuc)) va gianh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sai) OR (te bai)) ky sang mai khoi. hieu ve ((nam thuoc) OR (cam xuc)) va gianh lai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((te sai) or (te bai)) ky sang mai khoi. hieu ve ((nam thuoc) or (cam xuc)) va gianh lai cua tre*.