Perhaps you should try some spelling variations:
trang ha » trang va, trung ha, tang ha
trinh vi » trinh va, trinh ve, trinh viet
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
tinh vi » tinh voi, tinh va, dinh vi
coc tuc » coc luc, hoc thuc, doc thuc
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
tuc va » thuc va, truc va, tuc xa
va coc » va cuoc, va cac, va hoc

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 ((lang xa) or (trang ha)) hoi. hieu va coc tuc va ((tinh vi) or (trinh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((lang xa) OR (trang ha)) hoi. hieu va coc tuc va ((tinh vi) OR (trinh vi)) cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ty ((lang xa) or (trang ha)) hoi. hieu va coc tuc va ((tinh vi) or (trinh vi)) cua tre*.