Perhaps you should try some spelling variations:
thanh vien » thanh van
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
cham doc » cham soc, chat doc, chau doc
nang ma » tang ma, sang ma, nang cao
te sac » te sach, te cac, te san
cua tu » cua tuc, cua cu, cua te
doc va » duoc va, hoc va, duc va
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky nang ma hoi. hieu van cham doc va ((thanh vien) OR (nhan vien)) ((cua tu) or (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang ma hoi. hieu van cham doc va ((thanh vien) OR (nhan vien)) ((cua tu) OR (cua su)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky nang ma hoi. hieu van cham doc va ((thanh vien) OR (nhan vien)) ((cua tu) or (cua su))".
• Adding a wildcard symbol may retrieve word variants: te sac ky nang ma hoi. hieu van cham doc va ((thanh vien) OR (nhan vien)) ((cua tu) or (cua su))*.