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
chay qua » chay dua, cay qua, chay chua
qua ban » cua ban, qua quan
sach tu » sach thu, sach ty, sach uu
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
cach tu » cach thuc
va chay » va chat, va cham, va cay

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