Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
hieu van » hieu va, thien van, lieu va
lam duc » lam duoc, pham duc, nam duoc
van lam » van nam
mai hoi » mai khoi, dai hoi, lai hoi
thu san » thuy san, thu ban, phu san
ma hoi » xa hoi, ma hoa, me hoi
vi cua » vai cua, di cua
tu san » tu ban, tu can, vu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu san) or (thu san)) ky nang ((ma hoi) OR (mai hoi)). hieu van lam duc va thanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu san) OR (thu san)) ky nang ((ma hoi) OR (mai hoi)). hieu van lam duc va thanh vi cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu san) or (thu san)) ky nang ((ma hoi) OR (mai hoi)). hieu van lam duc va thanh vi cua viet".
• Adding a wildcard symbol may retrieve word variants: ((tu san) or (thu san)) ky nang ((ma hoi) OR (mai hoi)). hieu van lam duc va thanh vi cua viet*.