Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
hieu cao » chieu cao, hieu cac, hieu ca
chat luu » chat huu, chat lua, hat luu
vien cua » dien cua, tien cua, bien cua
te sach » toc sach
nang xa » lang xa, nang ma, mang xa
luu van » cuu van, luan van, luu hanh

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 y ((nang xa) or (nang x)) hoi. hieu cao chat luu van thanh ((vien cua) OR (viec cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang xa) OR (nang x)) hoi. hieu cao chat luu van thanh ((vien cua) OR (viec cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((nang xa) or (nang x)) hoi. hieu cao chat luu van thanh ((vien cua) OR (viec cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang xa) or (nang x)) hoi. hieu cao chat luu van thanh ((vien cua) OR (viec cua)) tre*.