Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
gat thanh » dat thanh, tat thanh, vat thanh
ky thanh » ky hanh, ty thanh, y thanh
su triet » su tien, ve triet
su viet » so viet
thu gat » thu gan, thu nhat, thu ngan
hieu ve » hieu va, hieu van
hoa doi » hoc doi, xoa doi, hoa duoc
hoa dai » hoa dan, hoc dai
ve nam » he nam, va nam, le nam
sac ky » cac ky, sai ky
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky thanh ((hoa doi) OR (hoa dai)). hieu ve nam thu gat thanh tai ((su triet) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky thanh ((hoa doi) OR (hoa dai)). hieu ve nam thu gat thanh tai ((su triet) OR (su viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky thanh ((hoa doi) OR (hoa dai)). hieu ve nam thu gat thanh tai ((su triet) or (su viet))".
• Adding a wildcard symbol may retrieve word variants: tu sac ky thanh ((hoa doi) OR (hoa dai)). hieu ve nam thu gat thanh tai ((su triet) or (su viet))*.