Perhaps you should try some spelling variations:
ve chat » va chat, van chat
dang ha » dong ha, dung ha, tang ha
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
lang ha » long ha
tu cham » toc cham, thi cham
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
vi luu » vi lua
tru » truc

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky ((dang ha) or (lang ha)) hoi. hieu ((ve chat) or (tu cham)) hoc va danh vi luu tru~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky ((dang ha) OR (lang ha)) hoi. hieu ((ve chat) OR (tu cham)) hoc va danh vi luu tru.
• Adding a wildcard symbol may retrieve word variants: tu sai ky ((dang ha) or (lang ha)) hoi. hieu ((ve chat) or (tu cham)) hoc va danh vi luu tru*.