Perhaps you should try some spelling variations:
chat xuc » chat huu, chao xu, chat cua
dac khoa » da khoa, dai khoa, dau khoa
te sach » toc sach
cao hoa » cao hoat, cao khoa, cau hoa
cam dan » cac dan, ca dan, nam dan
dau hoa » dau khoa, cau hoa, dai hoa
y nang » ky nang, ly nang, v nang

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 y nang cao hoa. hieu qua ((chat xuc) OR (cam xuc)) cam dan ((dau hoa) or (dac khoa)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang cao hoa. hieu qua ((chat xuc) OR (cam xuc)) cam dan ((dau hoa) OR (dac khoa)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang cao hoa. hieu qua ((chat xuc) OR (cam xuc)) cam dan ((dau hoa) or (dac khoa)) viet".
• Adding a wildcard symbol may retrieve word variants: te sach y nang cao hoa. hieu qua ((chat xuc) OR (cam xuc)) cam dan ((dau hoa) or (dac khoa)) viet*.