Perhaps you should try some spelling variations:
cach thuc » anh thuc, cac thu
danh cay » danh ca, danh cau, nhanh cay
xanh cay » xanh ca, nhanh cay, xanh a
tu sach » thu sach, su sach, te sach
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
cu tren » tu tren, dua tren
cac tu » cac thu, cach tu, cac du
vi cu » vi su, vi xu, vi du

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky ((danh cay) or (xanh cay)) phoi. hieu ve ((cac tu) or (cach thuc)) va hanh vi cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((danh cay) OR (xanh cay)) phoi. hieu ve ((cac tu) OR (cach thuc)) va hanh vi cu tren.
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((danh cay) or (xanh cay)) phoi. hieu ve ((cac tu) or (cach thuc)) va hanh vi cu tren*.