Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
xay tinh » may tinh, xa tinh, tay tinh
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
tinh di » tinh doi, trinh di, tinh da
tuc xay » thuc xay, tuc xa, tu xay
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
ty nang » ky nang, ty xang, ty hang
cau tuc » cau truc, cau tu, cau luc

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty nang x ho. ((hieu ve) OR (hieu qua)) cau tuc xay tinh di ((cua tre) OR (su triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang x ho. ((hieu ve) OR (hieu qua)) cau tuc xay tinh di ((cua tre) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang x ho. ((hieu ve) OR (hieu qua)) cau tuc xay tinh di ((cua tre) OR (su triet))*.