Perhaps you should try some spelling variations:
thieu hang » thieu khang, thieu quang, thi hang
tham thuc » nham thuc, pham thuc, tam thuc
cua triet » cua viet, su triet
thuc day » thuc dan, thuc vat
day hanh » day nhanh, day thanh, dao hanh
hanh tai » thanh tai, hang tai, han tai
va triet » va thiet, va trien, ve triet
tu sach » thu sach, su sach, te sach
hang xa » hoang xa, hang va, hang ca
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach thieu hang xa hoi. hieu va tham thuc day hanh tai ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thieu hang xa hoi. hieu va tham thuc day hanh tai ((cua triet) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach thieu hang xa hoi. hieu va tham thuc day hanh tai ((cua triet) or (va triet))*.