Perhaps you should try some spelling variations:
thuat sac » thuat sach, thuat san, thuat tac
thien van » thi van
hang tai » hang va, dung tai
tai cua » thai cua, tai cuc, tri cua
va hang » van hang, va nang, va lang
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
truc va » thuc va, thuc vat, trung va
cua te » cua tu
sac ky » cac ky, sai ky
ma hoi » xa hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sac ky nang ((ma hoi) or (mai hoi)). ((hieu ve) or (thien van)) cau truc va hang tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sac ky nang ((ma hoi) OR (mai hoi)). ((hieu ve) OR (thien van)) cau truc va hang tai cua te.
• Adding a wildcard symbol may retrieve word variants: thuat sac ky nang ((ma hoi) or (mai hoi)). ((hieu ve) or (thien van)) cau truc va hang tai cua te*.