Perhaps you should try some spelling variations:
dang xay » dang van
cao truc » cau truc, vao truc, cao thuoc
danh tai » doanh tai, dinh tai, hanh tai
te sach » toc sach
sach ky » sac ky, sach y, sach ty
truc va » thuc va, thuc vat, trung va
va danh » va dinh, va dan, va hanh
va cao » va cac, va co, va dao

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 ((dang xay) or (van xay)) hoi. lieu va cao truc va danh tai ((cua su) OR (qua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((dang xay) OR (van xay)) hoi. lieu va cao truc va danh tai ((cua su) OR (qua su)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((dang xay) or (van xay)) hoi. lieu va cao truc va danh tai ((cua su) OR (qua su))".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((dang xay) or (van xay)) hoi. lieu va cao truc va danh tai ((cua su) OR (qua su))*.