Perhaps you should try some spelling variations:
xa thanh » va thanh, ha thanh, ta thanh
vinh cau » sinh cau, minh cau, tinh cau
vinh cuu » dinh cuu, sinh cua, dinh cu
su sach » so sach, vu sach
nang xa » lang xa, nang ma, mang xa
hieu va » lieu va, hieu qua
lam tuc » lam thuoc, lam truoc, luat tuc
va lam » van lam, va lap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y ((nang xa) or (nang x)) hoi. hieu va lam tuc xa thanh ((vinh cau) OR (vinh cuu)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((nang xa) OR (nang x)) hoi. hieu va lam tuc xa thanh ((vinh cau) OR (vinh cuu)) tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((nang xa) or (nang x)) hoi. hieu va lam tuc xa thanh ((vinh cau) OR (vinh cuu)) tren".
• Adding a wildcard symbol may retrieve word variants: su sach y ((nang xa) or (nang x)) hoi. hieu va lam tuc xa thanh ((vinh cau) OR (vinh cuu)) tren*.