Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh de » hanh ve, hanh kem
hanh di » hanh vi, hang di, danh di
cam duc » cam xuc, cao duc, pham duc
khac ty » khac thi
vu khac » vu kham, vu khanh, bui khac
hieu ve » hieu va, hieu van
tang ma » tang van
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu khac ty ((tang ma) or (mang may)) hoi. hieu ve cam duc va ((hanh di) OR (hanh de)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khac ty ((tang ma) OR (mang may)) hoi. hieu ve cam duc va ((hanh di) OR (hanh de)) cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu khac ty ((tang ma) or (mang may)) hoi. hieu ve cam duc va ((hanh di) OR (hanh de)) cua triet*".