Perhaps you should try some spelling variations:
thanh dam » thanh dat, thanh nam, thanh tam
toc sach » hoc sach, doc sach, thuoc sach
hanh dao » lanh dao, thanh dat, doanh dao
pham tu » phan tu, pham thi, pham tai
ve pham » vi pham, v pham, ve phan
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
cua tuc » cua duc, cua tu, cua thuoc
tu van » tu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach y ((lang xa) or (van xay)) hoi. hieu ve pham tu van ((hanh dao) OR (thanh dam)) cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y ((lang xa) OR (van xay)) hoi. hieu ve pham tu van ((hanh dao) OR (thanh dam)) cua tuc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y ((lang xa) or (van xay)) hoi. hieu ve pham tu van ((hanh dao) OR (thanh dam)) cua tuc".
• Adding a wildcard symbol may retrieve word variants: toc sach y ((lang xa) or (van xay)) hoi. hieu ve pham tu van ((hanh dao) OR (thanh dam)) cua tuc*.