Perhaps you should try some spelling variations:
trinh tai » trinh toan, trinh tu, trinh han
hoang van » hang va
lang van » dang van, tang van, giang van
va trinh » van trinh, va tinh, lap trinh
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
tai cua » thai cua, tai cuc, tri cua
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: te sach tu ((hoang van) or (lang van)) hoi. hieu va cac xuc va trinh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu ((hoang van) OR (lang van)) hoi. hieu va cac xuc va trinh tai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach tu ((hoang van) or (lang van)) hoi. hieu va cac xuc va trinh tai cua tre*.