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 viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
hien tu » khien tu, dien tu
tu cham » toc cham, thi cham
dung de » dung he, dung dat
soc va » hoc va, loc va, doc va
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 soc va ((dan de) or (dung de)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tru nang x ho. hien tu cham soc va ((dan de) OR (dung de)) su triet.
• Adding a wildcard symbol may retrieve word variants: tu sach tru nang x ho. hien tu cham soc va ((dan de) or (dung de)) su triet*.