Perhaps you should try some spelling variations:
thu sac » thu sach, thu san, thu xac
va hanh » van hanh, va thanh, va danh
vu cham » va cham, vu kham, tu cham
ve chat » va chat, van chat
cao hoi » cau hoi, co hoi, cao hoc
sac ky » cac ky, sai ky
xuc va » duc va, tuc va, luc va
dai va » mai va
bi va » bo va
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sac ky nang cao hoi. hieu ((ve chat) or (vu cham)) xuc va hanh ((bi va) or (dai va)) thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sac ky nang cao hoi. hieu ((ve chat) OR (vu cham)) xuc va hanh ((bi va) OR (dai va)) thiet.
• Adding a wildcard symbol may retrieve word variants: thu sac ky nang cao hoi. hieu ((ve chat) or (vu cham)) xuc va hanh ((bi va) or (dai va)) thiet*.