Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cham tuc » nham thuc, pham thuc, tham thuc
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
xa tang » ha tang, ca tang, ba tang
tang di » hang di, tang du, tang da
di cua » dai cua, doi cua, de 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: ((su sach) or (thu sach)) ky nang xa hoi. hieu ve cham tuc xa tang di cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thu sach)) ky nang xa hoi. hieu ve cham tuc xa tang di cua tu.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thu sach)) ky nang xa hoi. hieu ve cham tuc xa tang di cua tu*.