Perhaps you should try some spelling variations:
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
dan hoc » van hoc, dan toc, toan hoc
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ve cam » ve cham, ve cac, va cam
cua tu » cua tuc, cua su, cua cu
x hoi » xa hoi, x ho, 5 hoi
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang ((x hoi) or (o hoi)). hieu ve cam duc va ((dan hoc) or (dai hoc)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ((x hoi) OR (o hoi)). hieu ve cam duc va ((dan hoc) OR (dai hoc)) cua tu.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((x hoi) or (o hoi)). hieu ve cam duc va ((dan hoc) or (dai hoc)) cua tu*.