Perhaps you should try some spelling variations:
cach thuc » anh thuc, cac thu
tay thai » lay thai, toc thai, y thai
cach hoc » cach thoi, dich hoc, cac hop
cuu tre » cua tre, cau tren, cau treo
va hanh » van hanh, va thanh, ban hanh
anh tay » canh tay, anh ta, anh hay
va danh » va dinh, va dan, dia danh
vi cuu » vi luu, vinh cuu
tu sac » tu sach, tu cac, tu san
sac ty » sach ty, sac ky
ty anh » ly anh, thuy anh

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 ty anh tay thai. lieu va ((cach hoc) OR (cach thuc)) ((va hanh) or (va danh)) vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ty anh tay thai. lieu va ((cach hoc) OR (cach thuc)) ((va hanh) OR (va danh)) vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ty anh tay thai. lieu va ((cach hoc) OR (cach thuc)) ((va hanh) or (va danh)) vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ty anh tay thai. lieu va ((cach hoc) OR (cach thuc)) ((va hanh) or (va danh)) vi cuu tre*.