Perhaps you should try some spelling variations:
trinh van » trinh han, trinh quan, trinh toan
hieu van » thien van, lieu va, hieu ve
hieu va » lieu va, hieu qua
lam tuc » lam thuoc, lam truoc, luat tuc
tinh va » tich va, trinh vat, tinh gia
cuu tre » cua tre, cau tren, cau treo
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
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 sac ky nang x hoi. ((hieu van) or (hieu va)) lam tuc xa ((tinh va) OR (trinh van)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang x hoi. ((hieu van) OR (hieu va)) lam tuc xa ((tinh va) OR (trinh van)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang x hoi. ((hieu van) or (hieu va)) lam tuc xa ((tinh va) OR (trinh van)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang x hoi. ((hieu van) or (hieu va)) lam tuc xa ((tinh va) OR (trinh van)) cuu tre*.