Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
sach ky » sach y, sach ty, sach kem
vai cua » dai cua, hai cua, lai cua
duc van » duc va, duc tan, duc manh
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
sac ky » cac ky, sai ky
cua su » qua su
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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 ((x hoi) or (o hoi)). hieu ve cam duc van hanh vai cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) nang ((x hoi) OR (o hoi)). hieu ve cam duc van hanh vai cua su.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sac ky)) nang ((x hoi) or (o hoi)). hieu ve cam duc van hanh vai cua su*.