Perhaps you should try some spelling variations:
thien san » thien van, trien san, thien ban
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
hanh vai » hanh vi, hanh va, hanh tai
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, dua tren
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
pham » phan

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 lang xa hoi. thien san pham duc van hanh vai ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky lang xa hoi. thien san pham duc van hanh vai ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: tu sai ky lang xa hoi. thien san pham duc van hanh vai ((cua tre) or (cua triet))*.