Perhaps you should try some spelling variations:
phan tai » nhan tai, phan thi, han tai
su triet » su tien, ve triet
pham tai » pham thi, pham van
su viet » so viet
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
tuc va » thuc va, truc va, tuc xa
sac ky » cac ky, sai ky
va cam » va cham, va cac, va cao
te sac » te sach, te cac, te san

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 lang xa hoi. hieu va cam tuc va ((phan tai) OR (pham tai)) ((su triet) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky lang xa hoi. hieu va cam tuc va ((phan tai) OR (pham tai)) ((su triet) OR (su viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky lang xa hoi. hieu va cam tuc va ((phan tai) OR (pham tai)) ((su triet) or (su viet))".
• Adding a wildcard symbol may retrieve word variants: te sac ky lang xa hoi. hieu va cam tuc va ((phan tai) OR (pham tai)) ((su triet) or (su viet))*.