Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
cua tre » cua te, cuu tre, cua triet
xua ban » xuat ban, cua ban, mua ban
benh vi » benh va, benh ve, benh li
qua ban » cua ban, qua quan
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
sac ky » cac ky, sai ky
vi cua » vai cua, di cua
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang xa hoi. ((hieu van) or (hieu va)) nam ((xua ban) or (qua ban)) benh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang xa hoi. ((hieu van) OR (hieu va)) nam ((xua ban) OR (qua ban)) benh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang xa hoi. ((hieu van) or (hieu va)) nam ((xua ban) or (qua ban)) benh vi cua tre*.