Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
nang ma » tang ma, sang ma, nang cao
va hanh » van hanh, va thanh, va danh
tai su » tai so, tai tu, lai su
va han » va phan, van han, va hang
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ve cam » ve cham, ve cac, ve cai
ma hoi » mai hoi, xa hoi, ma hoa
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky nang ma hoi. hieu ((ve cam) or (va cam)) tuc ((va han) OR (va hanh)) tai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang ma hoi. hieu ((ve cam) OR (va cam)) tuc ((va han) OR (va hanh)) tai su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky nang ma hoi. hieu ((ve cam) or (va cam)) tuc ((va han) OR (va hanh)) tai su triet".
• Adding a wildcard symbol may retrieve word variants: te sac ky nang ma hoi. hieu ((ve cam) or (va cam)) tuc ((va han) OR (va hanh)) tai su triet*.