Perhaps you should try some spelling variations:
thuoc tai » nuoc tai, hoc tai, thuoc ma
hieu van » hieu va, thien van, lieu va
dau truc » cau truc, dai truc, doan truc
va thanh » gia thanh, ban thanh, va tinh
thanh ve » hanh ve, thanh va, thanh vien
ky danh » ky dang
xay hoi » xa hoi, tay hoi, cay phoi
van dau » van dao, phan dau
truc va » thuc va, thuc vat, trung va
cu tren » tu tren, dua tren
ky anh » ly anh, ty anh
ve cu » ve cau, ve chu, ve cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc tai ((ky danh) or (ky anh)) xay hoi. hieu van dau truc va thanh ve cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc tai ((ky danh) OR (ky anh)) xay hoi. hieu van dau truc va thanh ve cu tren.
• Adding a wildcard symbol may retrieve word variants: thuoc tai ((ky danh) or (ky anh)) xay hoi. hieu van dau truc va thanh ve cu tren*.