Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
van cham » van chat, van tham, va cham
hieu van » hieu va, thien van, lieu va
sach ky » sac ky, sach y, sach kem
soc gia » toc gia, hoc gia, so gia
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
sach ty » sach y, sach tu, sach thu
su tren » su tien, tu tren, cu tren
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: vu ((sach ky) OR (sach ty)) ((nang xa) or (nang ma)) hoi. hieu van cham soc gia thanh vi su tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach ky) OR (sach ty)) ((nang xa) OR (nang ma)) hoi. hieu van cham soc gia thanh vi su tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((sach ky) OR (sach ty)) ((nang xa) or (nang ma)) hoi. hieu van cham soc gia thanh vi su tren".
• Adding a wildcard symbol may retrieve word variants: vu ((sach ky) OR (sach ty)) ((nang xa) or (nang ma)) hoi. hieu van cham soc gia thanh vi su tren*.