Perhaps you should try some spelling variations:
lam duoc » nam duoc, luat duoc, lam thuoc
thai cua » than cua, tai cuc, tri cua
va thanh » gia thanh, ban thanh, va tinh
hieu van » hieu va, thien van, lieu va
vai cua » dai cua, hai cua, lai cua
duoc va » nuoc va, duc va, duoc ma
van lam » van nam
ky dang » ky nang, ky danh
ky lang » ky nang, ky tang, tay lang
su xac » pu xac, su cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: su xac ((ky lang) OR (ky dang)) xa hoi. hieu van lam duoc va thanh ((vai cua) or (thai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su xac ((ky lang) OR (ky dang)) xa hoi. hieu van lam duoc va thanh ((vai cua) OR (thai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su xac ((ky lang) OR (ky dang)) xa hoi. hieu van lam duoc va thanh ((vai cua) or (thai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: su xac ((ky lang) OR (ky dang)) xa hoi. hieu van lam duoc va thanh ((vai cua) or (thai cua)) tre*.