Perhaps you should try some spelling variations:
thuat lanh » thuat lap, thuat san
hang dien » quang dien, dang dieu, nhan dien
hieu van » hieu va, thien van, lieu va
nam duoc » nam thuoc, da duoc, dat duoc
su triet » su viet, su tien, ve triet
lam duc » lam duoc, pham duc, lam dung
lanh ky » hanh ky, nganh ky, thanh ky
hanh de » hanh ve, hanh kem
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. hieu van ((lam duc) OR (nam duoc)) va ((hanh de) or (hang dien)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat lanh ky nang o hoi. hieu van ((lam duc) OR (nam duoc)) va ((hanh de) OR (hang dien)) su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat lanh ky nang o hoi. hieu van ((lam duc) OR (nam duoc)) va ((hanh de) or (hang dien)) su triet".
• Adding a wildcard symbol may retrieve word variants: thuat lanh ky nang o hoi. hieu van ((lam duc) OR (nam duoc)) va ((hanh de) or (hang dien)) su triet*.