Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
tu triet » su triet, tu thiet, tu trien
va thanh » gia thanh, ban thanh, va tinh
dang xay » dang van, van xay
cac toc » cac toi, cac nuoc, cac thoi
hieu va » lieu va, hieu qua
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
cac tuc » cac tu, cac tac, cac nuoc
hai tu » chai tu, hai thu, hoi tu

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 (dang xay)) hoi. hieu va ((cac tuc) or (cac toc)) va thanh hai tu triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((nang xa) OR (dang xay)) hoi. hieu va ((cac tuc) OR (cac toc)) va thanh hai tu triet.
• Adding a wildcard symbol may retrieve word variants: su sach y ((nang xa) or (dang xay)) hoi. hieu va ((cac tuc) or (cac toc)) va thanh hai tu triet*.