Perhaps you should try some spelling variations:
sach tay » sach hay, sach nay, sach tai
xach tay » canh tay
lang van » dang van, tang van, hoang van
van pham » san pham, van phan, van phat
lai cuu » lai cua, lai chau, lai cuoc
thi van » thi lan, thi hanh, thi nang
van hoi » van hoa, van hoc, van hoe
cuu tre » cua tre, cau tren, cau treo
va dan » ca dan, va dao, va dap
va dau » va dao

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 tay) or (xach tay)) lang van hoi. thi van pham duc ((va dan) OR (va dau)) lai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach tay) OR (xach tay)) lang van hoi. thi van pham duc ((va dan) OR (va dau)) lai cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach tay) or (xach tay)) lang van hoi. thi van pham duc ((va dan) OR (va dau)) lai cuu tre*".