Perhaps you should try some spelling variations:
hieu thien » hieu hien, chieu chien, dieu khien
thien hach » thien thanh, hien hanh
hach tuoc » bach tuoc, sach duoc, sach nuoc
va danh » va dinh, va hanh, dia danh
sach ky » sach y, sach ty, sach kem
lang xa » lang ha, dang xay, lang van
sac ky » cac ky, sai ky
va dan » ca dan, va dao, va dau
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: co ((sach ky) or (sac ky)) lang xa hoi. hieu thien hach tuoc ((va danh) OR (va dan)) vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co ((sach ky) OR (sac ky)) lang xa hoi. hieu thien hach tuoc ((va danh) OR (va dan)) vi cua tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co ((sach ky) or (sac ky)) lang xa hoi. hieu thien hach tuoc ((va danh) OR (va dan)) vi cua tu*".