Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hanh tai » thanh tai, hang tai, han tai
ly nang » ly hang, ly vang, ly quang
hieu ke » hieu kem, chieu ke, hieu ky
truc va » thuc va, trung va
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
ke cau » ket cau
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ((ly nang) OR (ky nang)) x hoi. hieu ke cau ((truc va) or (thuc vat)) hanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ((ly nang) OR (ky nang)) x hoi. hieu ke cau ((truc va) OR (thuc vat)) hanh tai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ((ly nang) OR (ky nang)) x hoi. hieu ke cau ((truc va) or (thuc vat)) hanh tai cua tre*".