Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, tu cach
hanh di » hanh vi, hanh de, hang di
xa hanh » xa thanh, xa khanh, va hanh
cam tuc » cam xuc, cam tu, nam thuc
van cam » van nam, van lam, van cau
mai hoi » mai khoi, dai hoi, lai hoi
te sach » toc sach
ma hoi » xa hoi, ma hoa, me hoi
y nang » ky nang, ly nang, v nang
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: ((tu sach) or (te sach)) y nang ((ma hoi) OR (mai hoi)). hieu van cam tuc xa hanh di cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) y nang ((ma hoi) OR (mai hoi)). hieu van cam tuc xa hanh di cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) y nang ((ma hoi) OR (mai hoi)). hieu van cam tuc xa hanh di cua tu".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) y nang ((ma hoi) OR (mai hoi)). hieu van cam tuc xa hanh di cua tu*.