Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, hieu ve
tan danh » tran danh, van danh, han danh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
lam duc » lam duoc, pham duc, nam duoc
di cua » dai cua, doi cua, do cua
de cua » le cua, te cua, dieu cua

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 ky nang x ho. ((hieu van) or (lieu va)) lam duc tan danh ((di cua) OR (de cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x ho. ((hieu van) OR (lieu va)) lam duc tan danh ((di cua) OR (de cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x ho. ((hieu van) or (lieu va)) lam duc tan danh ((di cua) OR (de cua)) tre*".