Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
thanh tai » thanh hai, doanh tai, thanh san
ve triet » va trien, su triet
lam quoc » lam duoc, nam quoc, lam thuoc
sach ky » sac ky, sach ty, sach kem
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
va lam » van lam, va lap
ma hoi » mai hoi, xa hoi, ma hoa
gia » giao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ky) OR (sach y)) nang ma hoi. hieu va lam quoc gia ((thanh tai) or (thanh toan)) ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach y)) nang ma hoi. hieu va lam quoc gia ((thanh tai) OR (thanh toan)) ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) OR (sach y)) nang ma hoi. hieu va lam quoc gia ((thanh tai) or (thanh toan)) ve triet".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) OR (sach y)) nang ma hoi. hieu va lam quoc gia ((thanh tai) or (thanh toan)) ve triet*.