Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
vinh cuu » sinh cua, dinh cu, tinh cua
dinh cuu » dinh chi
tu sach » thu sach, su sach, te sach
van lam » van nam
y nang » ky nang, ly nang, v nang
tuc va » thuc va, truc va, tuc xa
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 y nang x hoi. hieu van lam ((tuc va) or (thuc vat)) tinh ((vinh cuu) or (dinh cuu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang x hoi. hieu van lam ((tuc va) OR (thuc vat)) tinh ((vinh cuu) OR (dinh cuu)) tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. hieu van lam ((tuc va) or (thuc vat)) tinh ((vinh cuu) or (dinh cuu)) tre*.