Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh hai » thanh hai, nhanh hai, hang hai
thuc ban » thuoc ban, thuc dan, thuc van
mang mai » mang may, lang mai, mang lai
hieu va » lieu va
mai hoi » mai khoi, dai hoi, lai hoi
thu ban » thu hang
ky mang » ky nang, ke mang, ky dang
hai cua » thai cua, dai cua, hoi cua
sai ky » sac ky
tu sai » tu bai, tu san, tu cai

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 ky mang mai hoi. ((hieu va) or (hieu qua)) nham ((thuc ban) or (thu ban)) hanh hai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky mang mai hoi. ((hieu va) OR (hieu qua)) nham ((thuc ban) OR (thu ban)) hanh hai cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sai ky mang mai hoi. ((hieu va) or (hieu qua)) nham ((thuc ban) or (thu ban)) hanh hai cua triet*.