Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
ve cuac » ve cac, ve cuoc, ve chuan
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
sac ky » cac ky
dao va » dao van, tao va, do va
ve cua » le cua, de cua, te cua
di va » dai va, di vao, doi va

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((sai ky) or (sac ky)) nang ma hoi. hieu ((ve cua) or (ve cuac)) dao va hanh di va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sai ky) OR (sac ky)) nang ma hoi. hieu ((ve cua) OR (ve cuac)) dao va hanh di va triet.
• Adding a wildcard symbol may retrieve word variants: toc ((sai ky) or (sac ky)) nang ma hoi. hieu ((ve cua) or (ve cuac)) dao va hanh di va triet*.