Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
vinh cua » sinh cua, tinh cua, vinh cuu
dinh cua » dinh cuu, sinh cua, dinh cu
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nam qua » nam quan, nam mua, nam xua
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty nang o hoi. lieu va ((nam qua) or (nam cua)) va thanh ((vinh cua) OR (dinh cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang o hoi. lieu va ((nam qua) OR (nam cua)) va thanh ((vinh cua) OR (dinh cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang o hoi. lieu va ((nam qua) or (nam cua)) va thanh ((vinh cua) OR (dinh cua)) triet".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang o hoi. lieu va ((nam qua) or (nam cua)) va thanh ((vinh cua) OR (dinh cua)) triet*.