Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
luu van » cuu van, luu hanh
hanh de » hanh ve, hanh kem
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
va cau » van cau, va cac, va dau
de cau » ke cau, le cau, ve cau
luan » quan, lan

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sac ky) or (sach y)) nang ma hoi. hieu va cau ((luu van) OR (luan van)) hanh de cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sac ky) OR (sach y)) nang ma hoi. hieu va cau ((luu van) OR (luan van)) hanh de cau treo*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sac ky) or (sach y)) nang ma hoi. hieu va cau ((luu van) OR (luan van)) hanh de cau treo*".