Perhaps you should try some spelling variations:
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
truc va » thuc va, trung va
han tai » hang tai, nhan tai, van tai
su tien » su kien, su hien, tu tieng
te sac » te sach, te san
te cac » tu cac, ve cac, te cao
ve cam » ve cham, ve cac, va cam
tai su » tai so, tai tu, lai 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 sac) OR (te cac)) ky nang xa hoi. hieu ve cam ((truc va) or (thuc vat)) han tai su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (te cac)) ky nang xa hoi. hieu ve cam ((truc va) OR (thuc vat)) han tai su tien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sac) OR (te cac)) ky nang xa hoi. hieu ve cam ((truc va) or (thuc vat)) han tai su tien".
• Adding a wildcard symbol may retrieve word variants: ((te sac) OR (te cac)) ky nang xa hoi. hieu ve cam ((truc va) or (thuc vat)) han tai su tien*.