Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
va thanh » gia thanh, ban thanh, va tinh
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
hieu va » hieu qua
cac tu » cac thu, cach tu, cac du

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 ma) or (van xay)) hoi. ((hieu va) OR (lieu va)) cac tu va thanh lai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((nang ma) OR (van xay)) hoi. ((hieu va) OR (lieu va)) cac tu va thanh lai su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((nang ma) or (van xay)) hoi. ((hieu va) OR (lieu va)) cac tu va thanh lai su triet".
• Adding a wildcard symbol may retrieve word variants: su sach y ((nang ma) or (van xay)) hoi. ((hieu va) OR (lieu va)) cac tu va thanh lai su triet*.