Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
thanh tai » thanh hai, thanh toan, doanh tai
dan thanh » dang thanh, danh thanh, ban thanh
hoang van » hang va
ve triet » va trien, su triet
thuc dan » thuc hanh, hoc dan, thuc vat
su viet » so viet
va nham » va cham, va tham, va nha
hieu va » lieu va, hieu qua
tang ma » mang may, tang van
sac ky » cac ky, sai ky
tu sac » tu sach, tu cac, tu san

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 ((tang ma) or (hoang van)) hoi. hieu va nham thuc dan thanh tai ((ve triet) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((tang ma) OR (hoang van)) hoi. hieu va nham thuc dan thanh tai ((ve triet) OR (su viet)).
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((tang ma) or (hoang van)) hoi. hieu va nham thuc dan thanh tai ((ve triet) or (su viet))*.