Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
luoc can » luc canh, hoc can, luoc dai
luoc van » luoc va, luc van, luot van
va cham » va chat, va tham
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
hieu va » lieu va, hieu qua
vi su » va su, ve su, ki 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 ky ((nang xa) OR (nang ma)) hoi. hieu va cham ((luoc van) OR (luoc can)) hanh vi su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((nang xa) OR (nang ma)) hoi. hieu va cham ((luoc van) OR (luoc can)) hanh vi su triet".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang xa) OR (nang ma)) hoi. hieu va cham ((luoc van) OR (luoc can)) hanh vi su triet*.