Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
sach thi » sach thu, sach tai, sach thieu
thuc van » thuc vat, thuc dan, thuc va
truc van » truc va, truc ban, truc dan
hang di » hang doi, hang vi, hang dien
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach thi ((nang xa) OR (nang ma)) hoi. hieu va cam ((truc van) or (thuc van)) hang di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thi ((nang xa) OR (nang ma)) hoi. hieu va cam ((truc van) OR (thuc van)) hang di cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach thi ((nang xa) OR (nang ma)) hoi. hieu va cam ((truc van) or (thuc van)) hang di cua triet*".