Perhaps you should try some spelling variations:
sinh dai » sinh thai, si dai, sinh vat
te sach » toc sach
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cua triet, dua tren
va sinh » va kinh, va tinh, vi sinh
vu cham » va cham, vu kham, tu cham
ve cham » va cham, ve chat, ve chim
nang ma » tang ma, sang ma, nang cao
cuu tre » cau tren, cau treo
luc va » duc va, tuc va, loc va
ma hoi » mai hoi, xa hoi, ma hoa

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 ky nang ma hoi. hieu ((ve cham) OR (vu cham)) luc va sinh dai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ma hoi. hieu ((ve cham) OR (vu cham)) luc va sinh dai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ma hoi. hieu ((ve cham) OR (vu cham)) luc va sinh dai ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ma hoi. hieu ((ve cham) OR (vu cham)) luc va sinh dai ((cua tre) or (cuu tre))*.