Perhaps you should try some spelling variations:
nhan tai » hang tai, van tai, toan tai
van nhan » van phan, van thanh, danh nhan
lang van » dang van, tang van, hoang van
su sach » so sach, vu sach
van hau » van ha, van hai, van dau
tai cua » thai cua, tai cuc, tri cua
duc van » duc va, duc tan, duc manh
van cau » van dau, van chat, toan cau
nang xa » nang x, lang xa, nang ma
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y ((nang xa) or (lang van)) hoi. hieu ((van cau) OR (van hau)) duc van nhan tai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((nang xa) OR (lang van)) hoi. hieu ((van cau) OR (van hau)) duc van nhan tai cua tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((nang xa) or (lang van)) hoi. hieu ((van cau) OR (van hau)) duc van nhan tai cua tu*".