Perhaps you should try some spelling variations:
truc may » tren may, truc va
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu va » lieu va
tinh di » tinh doi, trinh di, tinh da
cuu tre » cua tre, cau tren, cau treo
di cuu » di cau, di cua, dinh cuu

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 va) or (hieu qua)) cau truc may tinh di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang x ho. ((hieu va) OR (hieu qua)) cau truc may tinh di cuu tre.
• Adding a wildcard symbol may retrieve word variants: su sach ty nang x ho. ((hieu va) or (hieu qua)) cau truc may tinh di cuu tre*.