Perhaps you should try some spelling variations:
tinh gian » tinh gia, trinh giang, trinh giao
tinh giao » trinh giao, tinh gia, minh giao
van phan » van phong, van thanh, luan phan
phan duc » pham duc, phan tu, phan dau
sach thu » sach thue, sach thieu, sach tham
hieu van » hieu va, thien van, lieu va
duc may » duc mau, duc man, duc manh
sach tu » cach tu, sach ty, sach uu
xu te » tu te

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 tu) or (sach thu)) nang x ho. hieu van phan duc may ((tinh gian) OR (tinh giao)) xu te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach tu) OR (sach thu)) nang x ho. hieu van phan duc may ((tinh gian) OR (tinh giao)) xu te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach tu) or (sach thu)) nang x ho. hieu van phan duc may ((tinh gian) OR (tinh giao)) xu te".
• Adding a wildcard symbol may retrieve word variants: te ((sach tu) or (sach thu)) nang x ho. hieu van phan duc may ((tinh gian) OR (tinh giao)) xu te*.