Perhaps you should try some spelling variations:
thien van » thi van
nang mai » nang ma, nang tai, lang mai
van pham » san pham, van phan, van phat
ve triet » va trien, su triet
mai hoi » mai khoi, dai hoi, lai hoi
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
sac ky » cac ky
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: hoc ((sac ky) OR (sai ky)) nang mai hoi. thien van pham duc va danh vi ((cua te) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((sac ky) OR (sai ky)) nang mai hoi. thien van pham duc va danh vi ((cua te) OR (ve triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((sac ky) OR (sai ky)) nang mai hoi. thien van pham duc va danh vi ((cua te) or (ve triet))*".