Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
cham xuc » cam xuc, chat xuc, cham soc
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
nang ma » tang ma, sang ma, nang cao
sach ky » sach y, sach ty, sach kem
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
ma hoi » mai hoi, xa hoi, ma hoa
sac ky » cac ky, sai ky
vi su » va su, ve su, ki su

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

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