Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh dai » hanh tai, hanh dao, vanh dai
ban hanh » ban hang
tham luc » than luc, tham nuoc, tham thuc
tang mai » tang ma, tang tai, lang mai
luc ban » duc ban, cuc ban, luc bat
va tham » van tham, va cham, va thanh
hieu va » lieu va, hieu qua
mai hoi » mai khoi, dai hoi, lai hoi

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

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