Perhaps you should try some spelling variations:
luc tieng » hoc tieng
cam truc » cau truc, nam truc, lam truoc
nhan tai » hang tai, van tai, toan tai
tu tieng » tu tuong, tu trong
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
truc va » thuc va, thuc vat, trung va
han tai » hang tai, van tai, toan tai
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ve cam » ve cham, ve cac, va cam

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 ky nang xa hoi. hieu ve cam truc va ((han tai) OR (nhan tai)) ((tu tieng) or (luc tieng))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang xa hoi. hieu ve cam truc va ((han tai) OR (nhan tai)) ((tu tieng) OR (luc tieng)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky nang xa hoi. hieu ve cam truc va ((han tai) OR (nhan tai)) ((tu tieng) or (luc tieng))".
• Adding a wildcard symbol may retrieve word variants: te sac ky nang xa hoi. hieu ve cam truc va ((han tai) OR (nhan tai)) ((tu tieng) or (luc tieng))*.