Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
dao van » do van, dang van
hanh ki » hanh vi, hanh ky, hanh kien
toc sac » toc sach, toc san, hoc sach
nang xa » nang x, lang xa, nang ma
sac ky » cac ky, sai ky
dao va » tao va, do va, cao va
ve ca » ve cac, ve cai, ve cau
ki su » ky su

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sac ky nang xa hoi. hieu ((ve ca) or (va cac)) ((dao va) OR (dao van)) hanh ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sac ky nang xa hoi. hieu ((ve ca) OR (va cac)) ((dao va) OR (dao van)) hanh ki su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sac ky nang xa hoi. hieu ((ve ca) or (va cac)) ((dao va) OR (dao van)) hanh ki su triet*".