Perhaps you should try some spelling variations:
van cham » van chat, van tham, va cham
dinh tri » chinh tri
h'roi va » hoi va, h'roi o
hieu van » hieu va, thien van, lieu va
cuu tre » cua tre, cau tren, cau treo
tri cuu » tri cua, tra cuu, trinh cuu
va dinh » van dinh, va kinh, va tinh
ky lang » ky nang, ky dang, ky tang
van hoe » van hoc, van hieu, van hien
tu sai » tu san, tu cai, tu lai
tu bai » tu ban, tu bat, te bai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sai) or (tu bai)) ky lang ((van hoe) OR (van hoa)). hieu van cham h'roi va dinh tri cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sai) OR (tu bai)) ky lang ((van hoe) OR (van hoa)). hieu van cham h'roi va dinh tri cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sai) or (tu bai)) ky lang ((van hoe) OR (van hoa)). hieu van cham h'roi va dinh tri cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sai) or (tu bai)) ky lang ((van hoe) OR (van hoa)). hieu van cham h'roi va dinh tri cuu tre*.