Perhaps you should try some spelling variations:
trang xa » trang va, trang ha, trong xa
hanh dao » lanh dao, thanh dat, thanh dam
luat tuc » luat thue
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, va danh
va luat » va thuat, vay luan, cua luat
hieu va » lieu va, hieu qua
tu sach » thu sach, su sach, te sach
tang ha » lang ha, tang ma, trung ha
tang xa » tang ma, lang xa, mang xa
tuc va » thuc va, truc va, tuc xa
dao va » dao van, tao va, do va
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky ((((tang xa) or (tang ha))) or (trang xa)) hoi. hieu va luat tuc va hanh dao va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((((tang xa) OR (tang ha))) OR (trang xa)) hoi. hieu va luat tuc va hanh dao va thiet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((((tang xa) or (tang ha))) or (trang xa)) hoi. hieu va luat tuc va hanh dao va thiet*.