Perhaps you should try some spelling variations:
chat hoc » chat hoa, chat thom, cho hoc
bach ky » bac ky
nang ma » tang ma, sang ma, nang cao
va chat » van chat, va phat, cao chat
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
ma hoi » mai hoi, xa hoi, ma hoa
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu bach ky nang ma hoi. lieu va chat hoc va hanh va ((cua te) OR (cua tu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu bach ky nang ma hoi. lieu va chat hoc va hanh va ((cua te) OR (cua tu))".
• Adding a wildcard symbol may retrieve word variants: vu bach ky nang ma hoi. lieu va chat hoc va hanh va ((cua te) OR (cua tu))*.