Perhaps you should try some spelling variations:
vu sach » vu bach, su sach, vu khach
cua tre » cuu tre, cua triet, dua tren
tinh vi » trinh vi, tinh voi, tinh va
va tinh » may tinh
coc duc » hoc duc, coc luc, hoc duoc
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
va coc » va cuoc, va cac, va hoc
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ty ((nang xa) OR (lang xa)) hoi. hieu va coc duc va tinh vi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty ((nang xa) OR (lang xa)) hoi. hieu va coc duc va tinh vi ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ty ((nang xa) OR (lang xa)) hoi. hieu va coc duc va tinh vi ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: vu sach ty ((nang xa) OR (lang xa)) hoi. hieu va coc duc va tinh vi ((cua tre) or (cua te))*.