Perhaps you should try some spelling variations:
truoc dam » truoc nam, thuoc dac, truc dai
truoc xa » truoc xay, truoc bua, truoc nam
hieu van » thien van, lieu va, hieu ve
tinh vi » trinh vi, tinh voi, tinh va
cuu tre » cua tre, cau tren, cau treo
hieu va » lieu va, hieu qua
san ky » sang ky, van ky, dan ky
vi cuu » vi luu, vinh cuu
tu san » thu san, tu ban, tu can
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky nang x hoi. ((hieu van) or (hieu va)) lam ((truoc xa) OR (truoc dam)) tinh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky nang x hoi. ((hieu van) OR (hieu va)) lam ((truoc xa) OR (truoc dam)) tinh vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky nang x hoi. ((hieu van) or (hieu va)) lam ((truoc xa) OR (truoc dam)) tinh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu san ky nang x hoi. ((hieu van) or (hieu va)) lam ((truoc xa) OR (truoc dam)) tinh vi cuu tre*.