Perhaps you should try some spelling variations:
thuat lanh » thuat lap, thuat san
hieu van » hieu va, thien van, lieu va
van pham » san pham, van phan, van phat
ty nang » ky nang, ty xang, ly nang
ty hang » ly hang, ty xang, thi hang
danh vi » hanh vi, danh di, danh va
dinh vi » dinh ve, dinh viet, dinh tri
tru » truc

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 ((ty nang) or (ty hang)) xa hoi. hieu van pham duc va ((danh vi) OR (dinh vi)) luu tru~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat lanh ((ty nang) OR (ty hang)) xa hoi. hieu van pham duc va ((danh vi) OR (dinh vi)) luu tru.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat lanh ((ty nang) or (ty hang)) xa hoi. hieu van pham duc va ((danh vi) OR (dinh vi)) luu tru".
• Adding a wildcard symbol may retrieve word variants: thuat lanh ((ty nang) or (ty hang)) xa hoi. hieu van pham duc va ((danh vi) OR (dinh vi)) luu tru*.