Perhaps you should try some spelling variations:
chat hoc » chat hoa, chat thom, cho hoc
hanh vai » hanh vi, hanh tai, hanh van
hieu van » hieu va, thien van, lieu va
ky lang » ky nang, ky dang, ky tang
lang ha » long ha
hanh va » hang va, hanh vi
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
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 sac ky lang ha noi. hieu van ((cham soc) or (chat hoc)) van ((hanh vai) or (hanh va)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky lang ha noi. hieu van ((cham soc) OR (chat hoc)) van ((hanh vai) OR (hanh va)) cua tu.
• Adding a wildcard symbol may retrieve word variants: su sac ky lang ha noi. hieu van ((cham soc) or (chat hoc)) van ((hanh vai) or (hanh va)) cua tu*.