Perhaps you should try some spelling variations:
thai cuu » thai cua, tai cuc, thi cuc
anh thai » anh thi, anh tai, nhanh thai
hieu ve » hieu va, hieu van
van anh » van thanh, tuan anh, van minh
duc van » duc va, duc tan, duc manh
cac duc » cac du, cao duc, cac dac
tu sach » thu sach, su sach, te sach
cuu tre » cua tre, cau tren, cau treo
y nang » ly nang, v nang, may nang
ve cac » va cac, vien cac
o hai » co hai, so hai, o lai
o hoi » co hoi, o hoc, o hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((y nang) or (ky nang)) ((o hoi) or (o hai)). hieu ve cac duc van anh thai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y nang) OR (ky nang)) ((o hoi) OR (o hai)). hieu ve cac duc van anh thai cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ((y nang) or (ky nang)) ((o hoi) or (o hai)). hieu ve cac duc van anh thai cuu tre*.