Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
su triet » su viet, su tien, ve triet
ky mang » ky nang, ke mang, ky dang
may hoi » may thoi, tay hoi, mai hoi
hieu va » lieu va, hieu qua
va cham » va chat, va tham
thuc va » thuc vat, thuc dan, thuc day
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
tai su » tai so, tai tu, lai su

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 mang may hoi. hieu va cham ((tuc xa) or (thuc va)) thanh tai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky mang may hoi. hieu va cham ((tuc xa) OR (thuc va)) thanh tai su triet.
• Adding a wildcard symbol may retrieve word variants: tu sac ky mang may hoi. hieu va cham ((tuc xa) or (thuc va)) thanh tai su triet*.