Perhaps you should try some spelling variations:
thuat lanh » thuat lap, thuat san
chat duc » chat xuc, chat doc, chet duoc
hoc viet » hoc hien
lanh ky » hanh ky, nganh ky, thanh ky
va chat » van chat, va phat, cao chat
hanh de » hanh ve, hanh kem
hang di » hang doi, hang vi, hang dien
nang o » nang co, nang ho, nang ro
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: thuat lanh ky nang o hoi. lieu va chat duc va ((hanh de) or (hang di)) hoc viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat lanh ky nang o hoi. lieu va chat duc va ((hanh de) OR (hang di)) hoc viet.
• Adding a wildcard symbol may retrieve word variants: thuat lanh ky nang o hoi. lieu va chat duc va ((hanh de) or (hang di)) hoc viet*.