Perhaps you should try some spelling variations:
trinh van » trinh han, trinh quan, trinh toan
cua viet » ca viet, hoa viet, cua vat
sach tay » xach tay, sach hay, sach nay
tay lang » tai lang, tay tang, tay quang
va trinh » van trinh, va tinh, lap trinh
van cua » vang cua, ban cua, dan cua
va cham » va chat, va tham
su sach » so sach, vu sach
lang xa » lang ha, dang xay, lang van
ve cham » ve chat, vu cham, ve chim
xuc va » duc va, tuc va, luc va
ve cam » ve cac, va cam, ve cai

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