Perhaps you should try some spelling variations:
nang tai » hang tai, tang tai, sang tai
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
tai hoi » tai khoi, dai hoi, tai hai
hieu va » lieu va, hieu qua
cam luc » cau luc
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang tai hoi. hieu va ((cam luc) or (cam xuc)) van hanh vi ((cua tu) or (cua nguoi))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang tai hoi. hieu va ((cam luc) OR (cam xuc)) van hanh vi ((cua tu) OR (cua nguoi)).
• Adding a wildcard symbol may retrieve word variants: su sach ky nang tai hoi. hieu va ((cam luc) or (cam xuc)) van hanh vi ((cua tu) or (cua nguoi))*.