Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
van tuan » van quan, van ban, anh tuan
va chat » van chat, va phat, cao chat
tuan di » tuan do, truan doi, quan doi
qua van » quan van, qua ban, qua san
cua tre » cua te, cuu tre, cua triet
cao hoi » cau hoi, co hoi, cao hoc
va cam » va cham, va cac, va cao
y nang » ky nang, ly nang, v nang
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (toc sach)) y nang cao hoi. hieu ((va cam) or (va chat)) qua van tuan di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) y nang cao hoi. hieu ((va cam) OR (va chat)) qua van tuan di cua tre.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) y nang cao hoi. hieu ((va cam) or (va chat)) qua van tuan di cua tre*.