Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
su triet » su viet, su tien, ve triet
va thanh » gia thanh, ban thanh, va tinh
cam duc » cam xuc, cao duc, pham duc
hieu va » lieu va, hieu qua
tu sach » thu sach, su sach, te sach
hieu ve » hieu van
nang xa » lang xa, nang ma, mang xa
hai su » hai vu, lai su, hai so

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y ((nang xa) or (nang x)) hoi. ((hieu ve) or (hieu va)) cam duc va thanh hai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang xa) OR (nang x)) hoi. ((hieu ve) OR (hieu va)) cam duc va thanh hai su triet.
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang xa) or (nang x)) hoi. ((hieu ve) or (hieu va)) cam duc va thanh hai su triet*.