Perhaps you should try some spelling variations:
kham xuc » kham xung, kham cuoc, cam xuc
sach ky » sach y, sach ty, sach kem
va tinh » may tinh
va hanh » van hanh, va thanh, va danh
vu kham » vu khanh
hieu vu » hieu va, hieu ve, hieu su
cao hoi » cau hoi, co hoi, cao hoc
sac ky » cac ky, sai ky
vai va » mai va, dai va, hai va
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) OR (sac ky)) nang cao hoi. hieu vu kham xuc ((va hanh) or (va tinh)) vai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) nang cao hoi. hieu vu kham xuc ((va hanh) OR (va tinh)) vai va thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sac ky)) nang cao hoi. hieu vu kham xuc ((va hanh) or (va tinh)) vai va thiet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sac ky)) nang cao hoi. hieu vu kham xuc ((va hanh) or (va tinh)) vai va thiet*.