Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thu sach » thuat sach, thuoc sach, thu hoach
van hanh » van thanh, ban hanh, van anh
van lam » van nam
xuc van » duc van, luc van, vuc van
lam xuc » cam xuc, lam duoc
tu sach » su sach, te sach, tu cach
ly nang » ky nang, ly hang, ly vang
hoi cua » hoi chuc
di cua » dai cua, doi cua, de cua
x hoi » xa hoi, o hoi, x ho

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) OR (thu sach)) ly nang x hoi. hieu van lam xuc van hanh ((di cua) or (hoi cua)) vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ly nang x hoi. hieu van lam xuc van hanh ((di cua) OR (hoi cua)) vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ly nang x hoi. hieu van lam xuc van hanh ((di cua) or (hoi cua)) vat".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ly nang x hoi. hieu van lam xuc van hanh ((di cua) or (hoi cua)) vat*.