Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
van chat » cao chat
hoc van » hoc dan, hoc va, hoc vat
chua te » cua te, chua xe, chuan ted
hanh va » hang va, hanh vi
chua tu » chu tu, cua tu, chua cu
va chat » va phat, cao chat, hoa chat
nang ma » tang ma, sang ma, nang cao
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
vu sac » vu sach, vu san, va sac

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sac ky nang ma hoi. lieu ((va chat) or (van chat)) hoc van hanh va ((chua te) or (chua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ky nang ma hoi. lieu ((va chat) OR (van chat)) hoc van hanh va ((chua te) OR (chua tu)).
• Adding a wildcard symbol may retrieve word variants: vu sac ky nang ma hoi. lieu ((va chat) or (van chat)) hoc van hanh va ((chua te) or (chua tu))*.