Perhaps you should try some spelling variations:
thue trong » thuc trong, thuat trong, thuoc trong
sach thue » sach thu, sach thieu, sach tham
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
va hanh » va thanh, va danh, ban hanh
cam tuc » cam xuc, cam tu, nam thuc
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
ma hoi » mai hoi, ma hoa, me hoi
vi cua » vai cua, di cua

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 thue trong ((ma hoi) OR (xa hoi)). hieu ve cam tuc ((va hanh) or (van hanh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thue trong ((ma hoi) OR (xa hoi)). hieu ve cam tuc ((va hanh) OR (van hanh)) vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach thue trong ((ma hoi) OR (xa hoi)). hieu ve cam tuc ((va hanh) or (van hanh)) vi cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach thue trong ((ma hoi) OR (xa hoi)). hieu ve cam tuc ((va hanh) or (van hanh)) vi cua tre*.