Perhaps you should try some spelling variations:
tinh cham » trinh cham, tinh chat, tinh tham
tinh cam » trinh cam, tinh nam, tinh cao
cuu tre » cua tre, cau tren, cau treo
ky dang » ky nang, ky danh
hieu ve » hieu va, hieu van
su tai » su thi, tu tai
tai ky » thai ky, trai ky, sai ky
ve duc » ve duoc, vu duc, le duc
duc tu » luc tu
tu xa » tu xay, tu va, te xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: su tai ky dang ((xa hoi) or (ha noi)). hieu ve duc tu xa ((tinh cham) OR (tinh cam)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su tai ky dang ((xa hoi) OR (ha noi)). hieu ve duc tu xa ((tinh cham) OR (tinh cam)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su tai ky dang ((xa hoi) or (ha noi)). hieu ve duc tu xa ((tinh cham) OR (tinh cam)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: su tai ky dang ((xa hoi) or (ha noi)). hieu ve duc tu xa ((tinh cham) OR (tinh cam)) cuu tre*.