Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
su triet » su viet, su tien, ve triet
dua tren » dung tren
dinh vi » dinh ve, dinh viet, dinh tri
thuc va » thuc vat, thuc dan, thuc day
te sach » toc sach
va tham » van tham, va cham, va thanh
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
va dinh » van dinh, va kinh, va tinh
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
cua te » cua tu

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 y nang ma hoi. hieu va tham thuc va dinh vi ((((dua tren) or (cua te))) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ma hoi. hieu va tham thuc va dinh vi ((((dua tren) OR (cua te))) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: te sach y nang ma hoi. hieu va tham thuc va dinh vi ((((dua tren) or (cua te))) or (su triet))*.