Perhaps you should try some spelling variations:
dang khoa » dung khoa, hang khoa, dang khoi
chat duc » chat xuc, chat doc, chet duoc
thanh vi » hanh vi, thanh va, thanh ve
khoa hoi » khoan hoi, khoa hoc, khoa doi
va thanh » gia thanh, ban thanh, va tinh
hieu va » lieu va, hieu qua
cuu tre » cua tre, cau tren, cau treo
ky dang » ky nang, ky danh
va chat » van chat, va phat, cao chat
su sac » su sach, su cac
su xac » pu xac, su cac
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sac) or (su xac)) ky dang khoa hoi. hieu va chat duc va thanh vi ((cuu tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su xac)) ky dang khoa hoi. hieu va chat duc va thanh vi ((cuu tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: ((su sac) or (su xac)) ky dang khoa hoi. hieu va chat duc va thanh vi ((cuu tre) or (cua te))*.