Perhaps you should try some spelling variations:
cham truc » cau truc, nham thuc, pham thuc
su triet » su viet, su tien, ve triet
hang dai » hoang dai, hang tai, hang dau
hanh de » hanh ve, hanh kem
hanh di » hanh vi, hang di, danh di
truc va » thuc va, thuc vat, trung va
sach ly » sach lo, sach ty, sach hay
hieu vu » hieu va, hieu ve, hieu su
dai tai » dai hai, dai thao
vu cham » va cham, vu kham, tu cham

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 ly) or (sach y)) hang dai tai. hieu vu cham truc va ((hanh di) OR (hanh de)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ly) OR (sach y)) hang dai tai. hieu vu cham truc va ((hanh di) OR (hanh de)) su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ly) or (sach y)) hang dai tai. hieu vu cham truc va ((hanh di) OR (hanh de)) su triet".
• Adding a wildcard symbol may retrieve word variants: su ((sach ly) or (sach y)) hang dai tai. hieu vu cham truc va ((hanh di) OR (hanh de)) su triet*.