Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
sach thu » sach thue, sach thieu, sach tham
cua tre » cua te, cuu tre, dua tren
va hanh » van hanh, va thanh, va danh
cam luc » cam xuc, cau luc
sach ty » sach y, sach tu, xach tay
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
luc va » duc va, tuc va, loc va

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) or (sach thu)) nang xa hoi. hieu va cam luc va hanh vi ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach thu)) nang xa hoi. hieu va cam luc va hanh vi ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) or (sach thu)) nang xa hoi. hieu va cam luc va hanh vi ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (sach thu)) nang xa hoi. hieu va cam luc va hanh vi ((cua tre) OR (cua triet))*.