Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh vai » thanh hai, thanh van, thanh tai
ban thanh » ban hanh, ban hang
dua tren » dung tren
hieu van » hieu va, thien van, lieu va
nang ma » tang ma, sang ma, nang cao
sach ky » sach y, sach ty, sach kem
nam qua » nam quan, nam cua, nam mua
qua ban » cua ban, qua quan
ma hoi » mai hoi, xa hoi, ma hoa
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ky) OR (sac ky)) nang ma hoi. hieu van nam qua ban thanh vai ((dua tren) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sac ky)) nang ma hoi. hieu van nam qua ban thanh vai ((dua tren) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) OR (sac ky)) nang ma hoi. hieu van nam qua ban thanh vai ((dua tren) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) OR (sac ky)) nang ma hoi. hieu van nam qua ban thanh vai ((dua tren) or (cua triet))*.