Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nham thuc » nhan thuc, nam thuc, nham thu
sach han » sach tham, sach danh, sach nang
han nang » phan nang, van nang, ban nang
cham tuc » pham thuc, tham thuc, cham soc
vat cua » mat cua, bat cua, dat cua
va sinh » va kinh, va tinh, vi sinh
te sach » toc sach
hieu ve » hieu van
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach han nang ma hoi. ((hieu ve) OR (hieu va)) ((cham tuc) or (nham thuc)) va sinh vat cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach han nang ma hoi. ((hieu ve) OR (hieu va)) ((cham tuc) OR (nham thuc)) va sinh vat cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach han nang ma hoi. ((hieu ve) OR (hieu va)) ((cham tuc) or (nham thuc)) va sinh vat cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach han nang ma hoi. ((hieu ve) OR (hieu va)) ((cham tuc) or (nham thuc)) va sinh vat cua triet*.