Perhaps you should try some spelling variations:
van nganh » van ngan, va nganh, vien nganh
sach thu » sach thue, sach thieu, sach tham
thu hang » thi hang, thuc hanh, thu huong
hang cau » hang dau, hang ca, nhung cau
phat xuc » chat xuc, phat xuat, phap xu
dieu tra » dieu tri, kiem tra
te sach » toc sach
xuc van » duc van, luc van, vuc van

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 thu hang cau hoi. lieu va phat xuc van nganh ((dieu cua) or (dieu tra)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach thu hang cau hoi. lieu va phat xuc van nganh ((dieu cua) OR (dieu tra)) tre.
• Adding a wildcard symbol may retrieve word variants: te sach thu hang cau hoi. lieu va phat xuc van nganh ((dieu cua) or (dieu tra)) tre*.