Perhaps you should try some spelling variations:
thanh day » thanh dat, thanh dam, thanh dan
thanh tay » thanh tai, thanh toan, thanh thuy
te sach » toc sach
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
nang ma » tang ma, sang ma, nang cao
van cac » van hac, van cau, dan cac
van bac » van ban, van bao, van hac
cua tre » cua te, cuu tre, cua triet

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 ly nang ma hoa. hieu ((van cac) OR (van bac)) duc va ((thanh day) or (thanh tay)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ly nang ma hoa. hieu ((van cac) OR (van bac)) duc va ((thanh day) OR (thanh tay)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ly nang ma hoa. hieu ((van cac) OR (van bac)) duc va ((thanh day) or (thanh tay)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ly nang ma hoa. hieu ((van cac) OR (van bac)) duc va ((thanh day) or (thanh tay)) cua tre*.