Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
va tinh » may tinh
nang xa » nang x, lang xa, nang ma
hieu ve » hieu van
doi cua » dai cua, hoi cua
hieu va » lieu va, hieu qua
cau luc » cau truc, cau phuc
di cua » dai cua, de cua, do cua
luc va » duc va, tuc va, loc va
y nang » ky nang, ly nang, v nang

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 xa hoi. ((hieu ve) or (hieu va)) cau luc va tinh ((di cua) or (doi cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. ((hieu ve) OR (hieu va)) cau luc va tinh ((di cua) OR (doi cua)) te.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. ((hieu ve) or (hieu va)) cau luc va tinh ((di cua) or (doi cua)) te*.