Perhaps you should try some spelling variations:
chet duoc » che duoc, cho duoc, che quoc
tang dai » tang tai, tang dan, lang dai
vu chet » vu chat
tinh ve » trinh ve, tinh ven, dinh ve
ky tang » ky nang, ky dang, kho tang
dai hoi » dai hoc, dai hai, dai moi
hieu vu » hieu va, hieu ve, hieu su
duoc va » nuoc va, duc va, duoc ma
va tinh » may tinh
tu sac » tu sach, tu san, tu bac
cua tu » cua tuc, cua su, cua cu

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) or (tu cac)) ky tang dai hoi. hieu vu chet duoc va tinh ve ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu cac)) ky tang dai hoi. hieu vu chet duoc va tinh ve ((cua te) OR (cua tu)).
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (tu cac)) ky tang dai hoi. hieu vu chet duoc va tinh ve ((cua te) or (cua tu))*.