Perhaps you should try some spelling variations:
va trien » va truyen, va thiet, va tuyen
hoc sai » hoc dai, hoc bai, hoc tai
nang ma » tang ma, sang ma, mang may
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
sai ky » sac ky
ve cam » ve cham, ve cac, va cam
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 sai ky ((nang ma) or (nang cao)) hoi. hieu ve cam xuc va hanh vi ((cua te) or (va trien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sai ky ((nang ma) OR (nang cao)) hoi. hieu ve cam xuc va hanh vi ((cua te) OR (va trien)).
• Adding a wildcard symbol may retrieve word variants: hoc sai ky ((nang ma) or (nang cao)) hoi. hieu ve cam xuc va hanh vi ((cua te) or (va trien))*.