Perhaps you should try some spelling variations:
hieu hieu » hien hieu, hieu hien, thien hieu
hieu luc » hieu luat, hieu qua
luc nuoc » lua nuoc, luan nuoc, duoc nuoc
danh vai » danh sai, danh va, doanh van
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
nang xa » lang xa, nang ma, mang xa
va danh » va dinh, va dan, va hanh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet

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 ty ((nang xa) OR (nang x)) hoi. hieu hieu luc nuoc va danh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((nang xa) OR (nang x)) hoi. hieu hieu luc nuoc va danh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang xa) OR (nang x)) hoi. hieu hieu luc nuoc va danh vai cua tre*.