Perhaps you should try some spelling variations:
thanh sinh » thanh binh, thanh tinh, thanh vinh
sinh cua » manh cua, dinh cuu, sinh va
va thanh » gia thanh, ban thanh, va tinh
nam quan » nam huan, nam qua, sam quan
quan va » quan vi, quan ha, luan va
cua tre » cua te, cuu tre, cua triet
nang co » nang cao, nang doc, nang noi
sach v » sach va, sach y, sach vay
va nam » van nam, ha nam, va nay
nang o » nang ho, nang ro, nang x
sach 2 » sach y

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 v) OR (sach 2)) ((nang o) or (nang co)) hoi. lieu va nam quan va thanh sinh cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach v) OR (sach 2)) ((nang o) OR (nang co)) hoi. lieu va nam quan va thanh sinh cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach v) OR (sach 2)) ((nang o) or (nang co)) hoi. lieu va nam quan va thanh sinh cua tre".
• Adding a wildcard symbol may retrieve word variants: su ((sach v) OR (sach 2)) ((nang o) or (nang co)) hoi. lieu va nam quan va thanh sinh cua tre*.