Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cam loc » cam lo
va hanh » van hanh, va thanh, va danh
hanh le » thanh le, hanh ve, hanh de
cua tre » cua te, cuu tre, dua tren
sach 2 » sach y
sach v » sach va, sach y, sach vay
loc va » hoc va, luc va
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((sach v) or (sach 2)) nang xa hoi. hieu va cam loc va hanh le ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach v) OR (sach 2)) nang xa hoi. hieu va cam loc va hanh le ((cua tre) OR (cua triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((sach v) or (sach 2)) nang xa hoi. hieu va cam loc va hanh le ((cua tre) OR (cua triet))*".