Perhaps you should try some spelling variations:
thi nang » thi cong, ki nang, thi hanh
dinh tri » dinh thi, chinh tri
lam duoc » nam duoc, luat duoc, lam thuoc
tri duc » tri du, tri dac, trinh duc
va dinh » van dinh, va kinh, va tinh
duoc va » nuoc va, duc va, duoc ma
duc tre » duoc tren, duc tien
sach tu » sach thu, cach tu, sach uu
thi van » thi lan, thi hanh
lang xa » lang ha, dang xay, lang van
sach ty » sach y, sach thu, xach tay

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach tu) or (sach ty)) lang xa hoi. ((thi van) or (thi nang)) lam duoc va dinh tri duc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach tu) OR (sach ty)) lang xa hoi. ((thi van) OR (thi nang)) lam duoc va dinh tri duc tre.
• Adding a wildcard symbol may retrieve word variants: thu ((sach tu) or (sach ty)) lang xa hoi. ((thi van) or (thi nang)) lam duoc va dinh tri duc tre*.