Perhaps you should try some spelling variations:
thanh dam » thanh dat, thanh nam, thanh tam
doanh dao » doanh bao, doanh cao, doanh giao
tu sach » thu sach, su sach, te sach
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » lieu va, hieu qua
cau luc » cau truc, cau phuc
luc bat » suc bat, luc nhat, luat bat
va cau » van cau, va cac, va dau
y nang » ky nang, ly nang, v nang
ma hoi » xa hoi, ma hoa, me hoi
cua su » qua su

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 ((ma hoi) or (mai hoi)). hieu va cau luc bat ((doanh dao) or (thanh dam)) cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ((ma hoi) OR (mai hoi)). hieu va cau luc bat ((doanh dao) OR (thanh dam)) cua su.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ((ma hoi) or (mai hoi)). hieu va cau luc bat ((doanh dao) or (thanh dam)) cua su*.