Perhaps you should try some spelling variations:
cham luan » pham luan, ham luan, phap luan
nang ma » sang ma, nang cao, mang may
tang ma » mang may, tang van
hieu vu » hieu va, hieu ve, hieu su
minh ve » dinh ve, minh va, kinh ve
cuu tre » cua tre, cau tren, cau treo
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ve cuu » ve cau, ve chu, ve cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky ((nang ma) OR (tang ma)) hoa. ((hieu vu) or (hieu qua)) cham luan van minh ve cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((nang ma) OR (tang ma)) hoa. ((hieu vu) OR (hieu qua)) cham luan van minh ve cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((nang ma) OR (tang ma)) hoa. ((hieu vu) or (hieu qua)) cham luan van minh ve cuu tre*".