Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh dao » lanh dao, thanh dat, thanh dam
dang xay » dang van, van xay
lang ha » long ha
dao cua » dai cua, day cua, dan cua
hieu va » lieu va, hieu qua
tuc va » thuc va, truc va, tuc xa
tu sai » tu bai, tu san, tu cai
luc va » duc va, loc va
sai ky » sac ky
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky ((lang ha) or (dang xay)) hoi. hieu va cam ((luc va) OR (tuc va)) hanh dao cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky ((lang ha) OR (dang xay)) hoi. hieu va cam ((luc va) OR (tuc va)) hanh dao cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky ((lang ha) or (dang xay)) hoi. hieu va cam ((luc va) OR (tuc va)) hanh dao cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sai ky ((lang ha) or (dang xay)) hoi. hieu va cam ((luc va) OR (tuc va)) hanh dao cua triet*.