Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hanh tri » thanh tri, hanh tai, hanh trinh
van hanh » van thanh, ban hanh, van anh
nuoc van » nuoc va, nuoc san, luoc van
sach ly » sach lo, sach ty, sach hay
nang ma » tang ma, sang ma, nang cao
ve cap » ve cac, ve cai, ve cau
le cap » le cau
tri su » tri du, tai su, trinh su

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 ly) OR (sach y)) nang ma hoa. hieu ((ve cap) or (le cap)) nuoc van hanh tri su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ly) OR (sach y)) nang ma hoa. hieu ((ve cap) OR (le cap)) nuoc van hanh tri su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ly) OR (sach y)) nang ma hoa. hieu ((ve cap) or (le cap)) nuoc van hanh tri su triet".
• Adding a wildcard symbol may retrieve word variants: te ((sach ly) OR (sach y)) nang ma hoa. hieu ((ve cap) or (le cap)) nuoc van hanh tri su triet*.