Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
manh hai » lanh hai, minh hai, thanh hai
quoc ban » quoc bao, quoc lan, quoc quan
sach ty » sach y, sach tu, sach thu
xuc ban » duc ban, cuc ban, xuat ban
te sach » toc sach
hieu va » lieu va, hieu qua
hieu ve » hieu van
van xa » van xay, van ha, dan xa
ty van » ly van, ta van
hai su » hai vu, lai su, hai so

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 ty van xa hoi. ((hieu ve) or (hieu va)) cam ((xuc ban) OR (quoc ban)) manh hai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty van xa hoi. ((hieu ve) OR (hieu va)) cam ((xuc ban) OR (quoc ban)) manh hai su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty van xa hoi. ((hieu ve) or (hieu va)) cam ((xuc ban) OR (quoc ban)) manh hai su triet".
• Adding a wildcard symbol may retrieve word variants: te sach ty van xa hoi. ((hieu ve) or (hieu va)) cam ((xuc ban) OR (quoc ban)) manh hai su triet*.