Perhaps you should try some spelling variations:
trinh toan » tinh toan, thanh toan, trinh han
cham xuc » cam xuc, chat xuc, cham soc
dang van » hoang van, hang va
trinh tu » trinh ky, trinh do
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
va cham » va chat, va tham
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va

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 ((dang van) or (lang xa)) hoi. hieu va cham xuc va ((trinh tu) or (trinh toan)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((dang van) OR (lang xa)) hoi. hieu va cham xuc va ((trinh tu) OR (trinh toan)) cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ty ((dang van) or (lang xa)) hoi. hieu va cham xuc va ((trinh tu) or (trinh toan)) cua tre*.