Perhaps you should try some spelling variations:
sach tru » sach truc, sach thu, sach tu
tru nang » tra nang, tri nang, truc nano
su triet » su tien, ve triet
cham duc » pham duc, cham soc, pham duy
tu sach » thu sach, su sach, te sach
dung de » dung he, dung dat
su viet » so viet
tu cham » toc cham, thi cham
hien tu » khien tu, dien tu
dan de » dan den, dang de, van de

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 tru nang x ho. hien tu cham duc va ((dan de) or (dung de)) ((su triet) OR (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tru nang x ho. hien tu cham duc va ((dan de) OR (dung de)) ((su triet) OR (su viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tru nang x ho. hien tu cham duc va ((dan de) or (dung de)) ((su triet) OR (su viet))".
• Adding a wildcard symbol may retrieve word variants: tu sach tru nang x ho. hien tu cham duc va ((dan de) or (dung de)) ((su triet) OR (su viet))*.