Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dua tren » dung tren
thuc van » thuc vat, thuc dan, thuc va
sach ty » sach y, sach tu, sach thu
hanh di » hanh vi, hanh de, hang di
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
tuc van » truc van, tuc va, duc van
va dau » va dao
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: su sach ty nang ma hoi. lieu va dau ((tuc van) OR (thuc van)) hanh di ((dua tren) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang ma hoi. lieu va dau ((tuc van) OR (thuc van)) hanh di ((dua tren) OR (cua triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang ma hoi. lieu va dau ((tuc van) OR (thuc van)) hanh di ((dua tren) or (cua triet))*".