Perhaps you should try some spelling variations:
ve triet » va trien, su triet
van hanh » van thanh, ban hanh, van anh
vuc van » duc van, luc van, thuc van
cam vuc » cam xuc
hieu ve » hieu va, hieu van
hoc sac » hoc sach, hoc cac, hoc mac
nang ma » tang ma, sang ma, mang may
sac ky » cac ky, sai ky
cua tu » cua tuc, cua su, cua cu
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: hoc sac ky ((nang ma) OR (nang cao)) hoi. hieu ve cam vuc van hanh vi ((cua tu) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sac ky ((nang ma) OR (nang cao)) hoi. hieu ve cam vuc van hanh vi ((cua tu) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sac ky ((nang ma) OR (nang cao)) hoi. hieu ve cam vuc van hanh vi ((cua tu) or (ve triet))".
• Adding a wildcard symbol may retrieve word variants: hoc sac ky ((nang ma) OR (nang cao)) hoi. hieu ve cam vuc van hanh vi ((cua tu) or (ve triet))*.