Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thuc xay » thuc day, tuc xay, thuat xay
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
thuc xa » tuc xa, thuc va, thuc ha
vai cua » dai cua, hai cua, bai cua
lai cua » dai cua, hai cua, lai chau
y nang » ky nang, ly nang, v nang
van am » van nam, van lam, van dam

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 y nang ma hoa. hieu van am ((thuc xa) OR (thuc xay)) hanh ((vai cua) or (lai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ma hoa. hieu van am ((thuc xa) OR (thuc xay)) hanh ((vai cua) OR (lai cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ma hoa. hieu van am ((thuc xa) OR (thuc xay)) hanh ((vai cua) or (lai cua)) tre*".