Perhaps you should try some spelling variations:
trinh vat » trinh van, trinh luat, sinh vat
hieu van » hieu va, thien van, lieu va
cuoc tuc » cuoi thuc, nuoc thuc, duoc tu
tinh va » tich va, trinh van, tinh gia
cua tre » cua te, cuu tre, cua triet
dang ha » dong ha, dung ha, lang ha
hieu ve » hieu va
ky dang » ky nang, ky danh
sai ky » sac ky
ha hoi » hoa hoi, ha noi, xa hoi
su sai » su tai, su hai, su dai

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

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