Perhaps you should try some spelling variations:
lam duoc » nam duoc, luat duoc, lam thuoc
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
nang ma » sang ma, nang cao, mang may
nang va » nang van, hang va, bang va
duoc va » nuoc va, duc va, duoc ma
van lam » van nam
tang ma » mang may, tang van
san ky » sang ky, van ky, ban ky
dan ky » van ky

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

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