Perhaps you should try some spelling variations:
hoang van » hang va
trinh tai » trinh toan, trinh tu, trinh han
cham xuc » cam xuc, chat xuc, cham soc
su sach » so sach, vu sach
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
va cham » va chat, va tham
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 y ((hoang van) or (lang xa)) hoi. hieu va cham xuc va ((trinh tai) or (tinh toan)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((hoang van) OR (lang xa)) hoi. hieu va cham xuc va ((trinh tai) OR (tinh toan)) cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach y ((hoang van) or (lang xa)) hoi. hieu va cham xuc va ((trinh tai) or (tinh toan)) cua tre*.