Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
ve triet » va trien, su triet
thu sach » tu sach, thuat sach, thuoc sach
xa thanh » va thanh, ha thanh, ta thanh
dang xay » dang van, van xay
nam thuc » nam thuoc, am thuc, nam thu
hieu va » lieu va, hieu qua
thuc xa » thuc xay, tuc xa, thuc va
te sach » toc sach
hieu ve » hieu van
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
dai ve » dap ve, dau ve, dai va

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) or (thu sach)) ky dang xay hoi. ((hieu ve) or (hieu va)) nam thuc xa thanh dai ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thu sach)) ky dang xay hoi. ((hieu ve) OR (hieu va)) nam thuc xa thanh dai ve triet.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thu sach)) ky dang xay hoi. ((hieu ve) or (hieu va)) nam thuc xa thanh dai ve triet*.