Perhaps you should try some spelling variations:
te sach » toc sach
hanh va » hanh vi
va hanh » van hanh, va thanh, va danh
cam tuc » cam xuc, cam tu, nam thuc
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
hang ca » nang cao, hang tai, hang dau
su tien » su kien, su hien, tu tieng

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty ((hang ca) or (hang va)) hoi. hieu ve ((cam tuc) or (nam thu)) va hanh va su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((hang ca) OR (hang va)) hoi. hieu ve ((cam tuc) OR (nam thu)) va hanh va su tien.
• Adding a wildcard symbol may retrieve word variants: te sach ty ((hang ca) or (hang va)) hoi. hieu ve ((cam tuc) or (nam thu)) va hanh va su tien*.