Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
tinh hai » tinh thai, tinh chat, trinh han
tinh tai » trinh tai, tinh thai, hinh tai
cam truc » cau truc, nam truc, lam truoc
hieu va » lieu va, hieu qua
truc va » thuc va, thuc vat, trung va
ky danh » ky dang
ky anh » ly anh, ty anh
va cam » va cham, va cac, va cao
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ((ky danh) or (ky anh)) xa hoi. hieu va cam truc va ((tinh tai) OR (tinh hai)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((ky danh) OR (ky anh)) xa hoi. hieu va cam truc va ((tinh tai) OR (tinh hai)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((ky danh) or (ky anh)) xa hoi. hieu va cam truc va ((tinh tai) OR (tinh hai)) cua te".
• Adding a wildcard symbol may retrieve word variants: toc sach ((ky danh) or (ky anh)) xa hoi. hieu va cam truc va ((tinh tai) OR (tinh hai)) cua te*.