Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
ban thanh » ban hanh, ban hang
va triet » va thiet, va trien, ve triet
va chay » va chat, va cham, va cay
dua ban » dia ban, cua ban, qua ban
su sach » vu sach
nang xa » nang x, lang xa, nang ma
tu nang » tru nang, tu nong, tu nano
so sach » so sanh, bo sach, co sach
hieu va » lieu va, hieu qua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (so sach)) tu nang xa hoi. hieu va chay dua ban thanh san ((cua triet) OR (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) tu nang xa hoi. hieu va chay dua ban thanh san ((cua triet) OR (va triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) tu nang xa hoi. hieu va chay dua ban thanh san ((cua triet) OR (va triet))".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) tu nang xa hoi. hieu va chay dua ban thanh san ((cua triet) OR (va triet))*.