Perhaps you should try some spelling variations:
trinh van » trinh han, trinh quan, trinh toan
cua tre » cua te, cuu tre, cua triet
tinh va » tich va, trinh vat, tinh gia
cau luc » cau truc, cau phuc
hieu ve » hieu va, hieu van
ky lang » ky dang, ky tang, tay lang
luc va » duc va, tuc va, loc va
ve cau » ke cau, va cau, ve cac
vu sac » vu sach, vu san, va sac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: vu sac ((ky lang) or (ky nang)) xa hoi. hieu ve cau luc va ((tinh va) OR (trinh van)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ((ky lang) OR (ky nang)) xa hoi. hieu ve cau luc va ((tinh va) OR (trinh van)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sac ((ky lang) or (ky nang)) xa hoi. hieu ve cau luc va ((tinh va) OR (trinh van)) cua tre".
• Adding a wildcard symbol may retrieve word variants: vu sac ((ky lang) or (ky nang)) xa hoi. hieu ve cau luc va ((tinh va) OR (trinh van)) cua tre*.