Perhaps you should try some spelling variations:
ve triet » va trien, su triet
hoc sac » hoc sach, hoc cac, hoc mac
nang ma » tang ma, sang ma, nang cao
va hanh » van hanh, va thanh, va danh
sac ky » cac ky, sai ky
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va
cua te » cua tu

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 hoa. hieu ((ve cam) or (va cam)) xuc va hanh vi ((cua te) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sac ky nang ma hoa. hieu ((ve cam) OR (va cam)) xuc va hanh vi ((cua te) OR (ve triet)).
• Adding a wildcard symbol may retrieve word variants: hoc sac ky nang ma hoa. hieu ((ve cam) or (va cam)) xuc va hanh vi ((cua te) or (ve triet))*.