Perhaps you should try some spelling variations:
thanh thai » thanh hai, thanh tai, nhanh thai
sang khoi » dang khoi, hang khoa, san khoa
khoi nang » hoi nang, khoi nganh, khoai lang
thu sang » thu hang, thu san, thu bang
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
thai cua » than cua, tai cuc, tri cua
van cam » van nam, van lam, van cau
cam duc » cam xuc, cao duc, pham duc
cua chu » sua chua
x hoi » xa hoi, o hoi, x ho
o hoc » mo hoc, so hoc, y hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sang khoi nang ((((x hoi) or (o hoc))) or (co hoc)). hieu van cam duc va thanh thai cua chu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sang khoi nang ((((x hoi) OR (o hoc))) OR (co hoc)). hieu van cam duc va thanh thai cua chu*.