Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
danh ban » doanh ban, danh bat, danh bac
xay danh » day danh, vay doanh, xay dung
nang mai » nang ma, nang tai, lang mai
thu xay » thau xay, thuc xay, tu xay
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach kem
mai hoi » mai khoi, dai hoi, lai hoi
sach ty » sach y, sach tu, sach thu
hieu ve » hieu van

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ky) or (sach ty)) nang mai hoi. ((hieu ve) or (hieu va)) nam thu xay danh ban va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach ty)) nang mai hoi. ((hieu ve) OR (hieu va)) nam thu xay danh ban va triet.
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sach ty)) nang mai hoi. ((hieu ve) or (hieu va)) nam thu xay danh ban va triet*.