Perhaps you should try some spelling variations:
truong doi » truong dai, trong doi, truong hoi
xa truong » cac truong
cau tren » cu tren, dau tren, ca tren
doi cau » doi dau, di cau, doi ca
cam tuc » cam xuc, cam tu, nam thuc
hieu va » lieu va, hieu qua
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
va cam » va cham, va cac, va cao
co hoi » co hoc, co loi
o hoi » o hoc, o hai, o hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty nang ((5 hoi) or (((o hoi) or (co hoi)))). hieu va cam tuc xa truong doi cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty nang ((5 hoi) OR (((o hoi) OR (co hoi)))). hieu va cam tuc xa truong doi cau tren.
• Adding a wildcard symbol may retrieve word variants: so sach ty nang ((5 hoi) or (((o hoi) or (co hoi)))). hieu va cam tuc xa truong doi cau tren*.