Perhaps you should try some spelling variations:
hanh sinh » hanh tinh, hanh dinh, hinh sinh
thu sach » tu sach, thuat sach, thuoc sach
sinh cua » manh cua, dinh cuu, sinh va
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ty nang ma hoi. hieu va cam ((((xuc van) or (thuc vat))) or (duc van)) hanh sinh cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nang ma hoi. hieu va cam ((((xuc van) OR (thuc vat))) OR (duc van)) hanh sinh cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang ma hoi. hieu va cam ((((xuc van) or (thuc vat))) or (duc van)) hanh sinh cua tre*.