Perhaps you should try some spelling variations:
hanh sinh » hanh tinh, hanh dinh, hinh sinh
cam truc » cau truc, lam truoc, nam truoc
nam truc » nam truoc, nam thuc, nam trung
sinh cua » manh cua, dinh cuu, sinh va
hieu van » hieu va, thien van, lieu va
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
sach tu » sach thu, cach tu, sach ty
lang co » lang o, nang co, tang co
tu lang » cu lang, tu lanh, xu lang
cua tre » cua te, cuu tre, cua triet
co hoi » co hoc, co loi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach tu lang co hoi. hieu van ((cam truc) OR (nam truc)) va hanh sinh cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tu lang co hoi. hieu van ((cam truc) OR (nam truc)) va hanh sinh cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach tu lang co hoi. hieu van ((cam truc) OR (nam truc)) va hanh sinh cua tre*.