Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh dai » thanh hai, thanh tai, thanh dat
dua tren » dung tren
va thanh » gia thanh, ban thanh, va tinh
cac luc » cau luc, coc luc, cac nuoc
hieu va » lieu va, hieu qua
nang ro » nang co, nang ho, nang ra
sac ky » cac ky
ro hoi » co hoi, o hoi, mo hoi
luc va » duc va, tuc va, loc va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (sai ky)) nang ro hoi. hieu va cac luc va thanh dai ((dua tren) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sac ky) OR (sai ky)) nang ro hoi. hieu va cac luc va thanh dai ((dua tren) or (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) OR (sai ky)) nang ro hoi. hieu va cac luc va thanh dai ((dua tren) or (cua triet))*.