Perhaps you should try some spelling variations:
thanh dam » thanh dat, thanh nam, thanh tam
hanh dao » lanh dao, thanh dat, doanh dao
te sach » toc sach
luc ban » duc ban, cuc ban, luc bat
tang ma » mang may, tang van
y tang » ky tang, 6 tang, 7 tang
va cau » van cau, va dau, va cao
ma hoi » mai hoi, xa hoi, ma hoa
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: te sach y tang ma hoi. hieu ((va cau) OR (va cac)) luc ban ((hanh dao) or (thanh dam)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y tang ma hoi. hieu ((va cau) OR (va cac)) luc ban ((hanh dao) OR (thanh dam)) cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y tang ma hoi. hieu ((va cau) OR (va cac)) luc ban ((hanh dao) or (thanh dam)) cua tu".
• Adding a wildcard symbol may retrieve word variants: te sach y tang ma hoi. hieu ((va cau) OR (va cac)) luc ban ((hanh dao) or (thanh dam)) cua tu*.