Perhaps you should try some spelling variations:
sach tri » sach tai, sach tren, sach truc
tri nang » thi nang, tra nang, tri bang
ban hanh » ban hang
te sach » toc sach
doi cua » dai cua, hoi cua
cam cuc » cham cuu, pham cuc
hieu va » lieu va, hieu qua
cao hoi » cau hoi, co hoi, cao hoc
di cua » dai cua, de cua, do cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach tri nang cao hoi. hieu va ((cam cuc) OR (cam xuc)) ban hanh ((di cua) or (doi cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tri nang cao hoi. hieu va ((cam cuc) OR (cam xuc)) ban hanh ((di cua) OR (doi cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tri nang cao hoi. hieu va ((cam cuc) OR (cam xuc)) ban hanh ((di cua) or (doi cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach tri nang cao hoi. hieu va ((cam cuc) OR (cam xuc)) ban hanh ((di cua) or (doi cua)) tre*.