Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
sach tu » sach thu, sach ty, sach uu
cach tu » cach thuc
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
lam luc » lao luc, lam duoc
va nang » van nang, da nang, cam nang
nang va » nang van, hang va, nang ma
va lam » van lam, va lap
luc va » duc va, tuc va, loc va
va cua » va chua, via cua, ca cua

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 tu) OR (cach tu)) lang xa hoi. hieu va lam luc va nang va cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach tu) OR (cach tu)) lang xa hoi. hieu va lam luc va nang va cua triet".
• Adding a wildcard symbol may retrieve word variants: te ((sach tu) OR (cach tu)) lang xa hoi. hieu va lam luc va nang va cua triet*.